Nick Lachey's son has entered the terrible twos.
The 40-year-old singer, who previously claimed his 22-month-old little boy, Camden, was "an angel," admits he recently started displaying some naughty behaviour.
The VH1 host, who announced this week that his wife, Vanessa Lachey, is pregnant with a baby girl, told PEOPLE.com: "He knows the word 'no' - of course he didn't learn it from me, but he knows the word.
"He's a typical 2-year-old. He sees how much he can get away with and pushes the end of the envelope, but it's a lot of fun."
The former 98 Degrees singer thinks Camden is very entertaining.
He said: "It's a great age. He's discovering his personality, he's getting into everything [and] he's talking like crazy. They start to figure things out and push their boundaries."
Shortly before confirming he and Vanessa are expecting their second child, Nick admitted he was eager to have a daughter.
He said: "We won't wait too much longer. I really want to have a little girl."
The couple, who started dating shortly after Nick's split from ex-wife Jessica Simpson, tied the knot in 2011.

Adam Levine is "very amped up" ahead of his wedding.
The Maroon 5 frontman, who is reportedly set to wed Victoria's Secret model Behati Prinsloo at the exclusive Hotel El Ganzo in Los Cabos, Mexico later today (19.07.14), is "really excited" to get married, according his bandmate James Valentine.
The guitarist told ABC News Radio: "I think he's really excited. I expected him to be more nervous. They're very amped up. They're very happy. It's going to be really fun."
James also revealed that their fellow bandmate Jesse Carmichael, who recently returned to the band after taking a hiatus, will be 'The Voice' USA mentor's best man, as they have know each other since they were 12 years old.
He told Australian radio station 2DayFM: "Those guys go back. What's interesting about the band is, I've been with the band for 15 years but I'm still one of the 'new' members!'"
But James will be performing a "nice little medley" of Beatles tunes during the couple's intimate beach ceremony.
He joked: "It's just another gig for me. I'm gonna be playing some solo acoustic guitar during the ceremony when people are walking [in]."
He doesn't think Adam and the 25-year-old beauty will "settle down" after they're married.
He said: "They will not! They're so much fun to be around together. I'm very happy for them."

Matt LeBlanc can't wait to meet Courteney Cox's fiancé.
The 46-year-old actor hasn't met Johnny McDaid despite still being in regular contact with his former 'Friends' co-star, who got engaged to the Snow Patrol rocker last month.
The 'Episodes' star told E! News: "I haven't met him yet. I want to meet him. Apparently, he's a great guy. I'm sure he's awesome. Courteney likes him!"
The brunette beauty had dinner with two of her other former co-stars Lisa Kudrow and Jennifer Aniston earlier this week in Los Angeles, sparking rumours they are planning a 'Friends' reunion, and Matt revealed they video called him from the restaurant.
He said: "They Facetimed me from the restaurant. So I talked to them over the phone and saw them all."
But he added: "They've been eating lunch together for 20 years. It was no reunion. They never split up."
Courteney previously claimed it was impossible to get all of her former castmates together for dinner.
The 50-year-old star said: "Let me tell you something: there's six friends and I've been trying to put together a cast dinner for 10 years. It doesn't happen! I can get the girls to come, maybe Matthew Perry. Matt LeBlanc cancelled last time right at the last minute, [David] Schwimmer lives here [in New York City], so it's just not gonna happen."

Kanye West has formed a close bond with Khloé Kardashian's new boyfriend.
French Montana, who started dating the 30-year-old reality TV star in April, claims he talks to the 'New Slaves' hitmaker, who is married to Khloé's sister Kim Kardashian, "about everything" and they have a "great relationship."
The 29-year-old rapper told Complex magazine: "That's Kanye, man, we just sit down and talk about everything's that going on with hip-hop... this and that."
Kanye is also helping French with his music career.
The 'Pop That' rapper said: "Kanye's overseeing the production of my entire album. I just wanna give my fans what they know me for. I don't want to change with what people are following."
He added: "We did like, four songs."
French also claims that Kanye, 37, almost signed him to his record label a few years ago.
He said: "Kanye was actually going to sign me. Since around that time, we both had great chemistry and a great relationship."
French is the first person Khloé has dated since filing for divorce from her husband of four years, Lamar Odom, in December.
She recently admitted: "French is just what I need right now."

Ashlee Simpson brought her fiancé to her ex-boyfriend's birthday bash.
The 29-year-old star, who got engaged to actor Evan Ross earlier this year, helped Ryan Cabrera celebrate his 32nd birthday at the Kia Motors Malibu Estate in California on Sunday (13.07.14).
An eyewitness, who saw the couple there, told UsMagazine.com: "They were both super cute with one another, very affectionate and very touchy feely.
"At one point Ashlee even had Evan sitting on her lap as they conversed with their friends."
The blonde beauty dated Ryan, who was previously managed by her father, Joe Simpson, in 2004.
The 'Pieces of Me' hitmaker was also overheard "urging Ryan to play his new record for Evan so he could listen to it and maybe give him some insight on some lyrics that Ryan was struggling with. Evan and Ryan talked about collaborating and getting in the studio together. Both of them sounded super stoked on the idea and will be making it happen sooner than later."
Ashlee, who has five-year-old son Bronx with ex-husband Pete Wentz, will reportedly marry Evan, 25, at his mother Diana Ross' mansion in Los Angeles next month.

Wentworth Miller felt he was "feeding a fantasy" before announcing he is gay.
The former 'Prison Break' star, who opened up about his sexuality for the first time last August, says he has a better relationship with his fans now.
The 42-year-old actor told Details magazine: "I feel more fully expressed.
"After 'Prison Break,' I came to grips with the fact that my public persona was in misalignment with how I actually felt. I was out to a handful of people in my twenties, and once I hit 30, I was out to family and friends. But professionally, I was feeding a fantasy. I created this air of 'We don't address that thing.' "
Asked if he felt like he was lying about his sexuality in the past, he said: "My face was on billboards, and I thought it was my job to act a certain way. But I think audiences knew to a certain degree.
"The people onscreen aren't the characters they're playing. They're our projection of who we want them to be. I think it's possible to have a man-crush if you're not gay or to have a crush on a guy you know to be gay if you're a woman."
He added: "Attraction is fluid, and I think our imaginations are strong enough to hold a container for all of this complexity, even if we know on a subconscious level something's not what it appears to be."

Blake Lively thinks Ryan Reynolds is going to be a great father.
The 26-year-old actress, who married her 'The Green Lantern' co-star, 37, in a secret ceremony in September 2012, admits she loves the fact he is more than a decade older than her because he "lived so much" before they got together.
The former 'Gossip Girl' star said: "He's going to be a great father and leader and patriarch - he's so meant to be all of those things. The fact that he lived so much before we got together, he's the exact realised person that he should be. And so I get to share my life with the person he's become, and we get to grow from there."
The blonde beauty claims their wedding "was becoming a disaster" before they asked Martha Stewart to oversee the event in South Carolina.
The 'Age of Adaline' star also told the August issue of Vogue magazine that she and Ryan, who was previously married to Scarlett Johansson, collaborate on everything, including her new lifestyle website, Preserve.
She said: "He's a part of it because everything we do in life we do together. If I'm working on a movie, he helps me with my character; I do the same with him. Picking out a coffee table. What we're going to eat. He's a beautiful writer - he's written a lot of stuff for us. And he's got a great barometer and he knows me, so he will tell me if it's not as good as it can be."
Her new venture has already been compared to Gwyneth Paltrow's website Goop and Blake admits she is inspired by the actress.
She said: "I'm always the first person to defend Gwyneth Paltrow. Or any woman in a position of power, like Martha Stewart or Oprah, who gets burned because they have paved the path for so many other women who are doing something they believe in."

Christina Milian's new romance with Lil Wayne is reportedly a publicity stunt.
The 'Dip It Low' hitmaker, who recently ended her engagement with Jas Prince, was spotted holding hands with the rapper at the ESPY Awards in Los Angles last night (17.07.14), sparking rumours they're dating.
A source told gossip website TMZ.com that they are definitely not in a relationship and they are merely attempting to generate publicity, as Christina recently signed a deal with his record label, Young Money Entertainment.
But another source told UsMagazine.com: "It is totally true. They are hooking up."
The duo have been friends for a number of years, as Christina has four-year-old daughter Violet with ex-husband The Dream, while Lil Wayne's ex-girlfriend Nivea also has three children with The Dream.
The 32-year-old singer moved out of the house she shared with Jas, the CEO of Rap-A-Lot-Records, last month and hinted she was ready to move on.
She wrote on Instagram: "There comes a time in life, when you walk away from all the drama and people who create it. Surround yourself with people who make you laugh, forget the bad, and focus on the good. Love the people who treat you right. Pray for the ones who don't. Life is too short to be anything but happy. Falling down is part of life, getting back up is living."

Adam Levine will reportedly marry Behati Prinsloo in Mexico tomorrow (19.07.14).
The Maroon 5 frontman, who got engaged last July, is expected to exchange vows with the Namibian model in an intimate beach ceremony at the exclusive Hotel El Ganzo in Los Cabos.
A source told the MailOnline that the 35-year-old singer and his 25-year-old fiancée checked into the resort today (18.07.14) ahead of their nuptials.
They are believed to have booked out all 72-rooms for their guests, including 'The Wolf of Wall Street' star Jonah Hill, who has known the singer since childhood and whose older brother, Jordan Feldstein, manages Adam's band.
Behati's close friends and Victoria's Secret colleagues Candice Swanepoel and Erin Heatherton are also expected to attend the festivities, including the couple's rehearsal dinner tonight.
The 'Voice' USA mentor recently admitted he feels ready to settle down after dating a string of beauties, including model Anne V, in the past.
He said: "In my lifetime I've done it right. I've had plenty of fun."
He added: "I definitely feel like I'm sitting in the chair I'm supposed to be sitting in right now. It all feels very natural."

David Beckham admits he is a strict father.
The 39-year-old retired soccer star - who has sons Brooklyn, 15, Romeo, 11, and Cruz, nine, and three-year-old daughter Harper with wife Victoria Beckham - only lets their sons play video games for one hour a day, as he prefers them to play outside.
Asked if his children play sports-themed video games, he told PEOPLE.com at the inaugural Nickelodeon Kids' Choice Sports Awards in Los Angeles last night (17.07.14): "We put a time limit on it. You have to. No more than an hour. I know that sounds pretty harsh, but I want my boys to be outside playing."
He added: "It's so important to me that they're involved in sports -- for discipline and health. [Brooklyn] is pretty skilful. My middle one, Romeo, is the quick one; he's super fast. The small one, [Cruz], is the tough one, of course -- being the smallest boy."
But David says his daughter is more interested in watching movies.
He said: "She just had her third birthday party and it was 'Frozen'-themed. My little girl is the biggest 'Frozen' fan ever."

Harry Styles was among the stars at Warner Music Group's big summer party last night (17.07.14).
The 20-year-old heartthrob took a break from One Direction's sell-out 'Where We Are' stadium world tour to sip cocktails at the lavish party, held in association with British GQ magazine, at Shoreditch House in trendy east London.
Harry and other A-list guests enjoyed music-themed cocktails including the Parlophone Punch, Atlantic Breeze and Warner Spritz.
Other stars who attended the lavish bash included former Girls Aloud star Nicola Roberts, who wore a striking halter-neck red dress, Conor Maynard, Rudimental and Amber Le Bon.
Harry was recently praised for his songwriting skills by US songbird Ariana Grande, for whom he penned a track called 'A Little Bit of Your Heart'.
She said: "I was at the studio one day and he was there, and literally, [songwriters] Johan [Carlsson] and Savan [Kotecha] were like, 'Hey, do you want to write something for Ariana?' And he was like, 'Sure, mate.' And he just did.
"It's a beautiful song. He's an amazing writer. It's really beautiful. He's amazingly talented."

Nina Dobrev tries to be good to everyone including her exes.
The 25-year-old actress likes to be positive and treat people well even if she has been through a bitter break-up with them.
She told Nylon magazine: "I don't like any kind of negativity.
"I try to be good to everyone, whether it's a love, a friend, an ex. I'll always try to treat people the way I want to be treated."
Nina's 'Vampire Diaries' co-star and ex-boyfriend Ian Somerhalder agrees that she's good at practicing what she preaches.
He joked: "She always lets me have the last fry."
The actress' love life is never without speculation and she has recently been linked to fellow actor James Marsden after the pair were spotted kissing "in a corner" at a karaoke bar in New Orleans.
A source told the American edition of OK! magazine: "[There was] more kissing than singing."
The stars reportedly left the bar together at 3am, before jumping in a taxi and passionately locking lips again.
A source told HollywoodLife.com: "Nina thinks James is hot. They have met before and they did hook up and had a great time. It was a fun night of drinking and hooking up on Bourbon Street."