Gary Barlow says it's "too early" for One Direction to consider splitting up.
The 43-year-old singer - who was catapulted to the spotlight as part of boy band Take That - admits groups often have disagreements but insists Harry Styles, Zayn Malik, Louis Tomlinson, Niall Horan and Liam Payne must "look after one another".
He told The Sun newspaper: "There will be rows in a band but you are brothers.
"They might be close sometimes and sometimes not, but it's part of the foundations -- the boys have to take care of one another and look after one another.
"You are having an amazing run and it's brilliant. You can't walk away from that -- why would you?
"Whenever I've met them they seem incredibly adult about the whole thing.
"I think it's brilliant there is such a group representing Britain. If there's any suggestion of trouble, they need to hang on in there. It's way too early to be thinking about splitting up."
Gary kicked off his 'Since I Saw You Last' tour in Belfast on Saturday night (29.03.14), and reminisced about performing in the city with Take That - which also includes Howard Donald, Jason Orange, Mark Owen and Robbie Williams.
He added: "We started the 'Beautiful World' tour here with Take That and I'm a bit superstitious. It felt right and it felt like a good place to start. Two hours is a long time for me to be up there by myself, but we'll get there."

James Lock believes 'The Only Way Is Essex' fans aspire to be like the cast.
The hunk insists he didn't join the reality TV show to become famous as he'd much rather have success, and he believes viewers are keen to follow in their footsteps.
He said: "I don't like how people assume that reality TV stars are just fame hungry. Personally, I'm not fame hungry. I'm success hungry.
"All reality stars seem to get tarred with the same brush, but shows like 'TOWIE' and 'Made in Chelsea' are in a league of their own. Look at all the boys who've copied Joey's [Essex] style, or the girls with Lucy [Mecklenburgh]. People aspire to be us."
James doesn't think other reality shows compare to 'TOWIE', and slams MTV's 'Geordie Shore', which is based in Newcastle and 'The Valleys', which is based in Cardiff, whose fans laugh "at them".
He explained to Gay Times magazine: "With something like 'The Valleys', they're laughing at them, not with them. And 'Geordie Shore' is very seedy. It's just a house full of idiots being videod and getting pissed.
"'The Valleys' is an absolute joke. The thing is you meet them and think they wont be as bad in real life, but I've met a couple of the girls are they're really bad. I don't mean this in a snobby way, but they're just not the sort of people you want to associate with."

Michelle Keegan has reportedly banned Mark Wright from having his stag party in Marbella.
The former 'Only Way is Essex' hunk is keen to hold his pre-wedding bash in the Spanish town, but the 'Coronation street' star is worried about his behaviour while he's away.
A source said: "Michelle would absolutely hate him going there. Everyone knows what goes on in Marbs and that girls in bikinis would be throwing themselves at Mark left, right and centre. He'd get led astray. It would be a completely mad, over-the-top few days and even if nothing happened, there would be speculation that it had.
"Michelle has made herself very clear. Its caused a bit of tension, as Mark feels under pressure from both sides - his mates, and Michelle. He doesn't want to have to consult Michelle every time he plans an event."
Mark, who proposed to Michelle last year, is keen to head to southern Spain because he knows he'll be well looked after while he and his pals are there.
The insider explained to HEAT magazine: "He's treated like a king over there and has whatever he wants, any time of day. All the lads involved, including his cousin, Elliott and brother Josh, made suggestions, but Marbs was everyone's top choice. Mark's got a lot of friends over there who'd make sure he was well looked after, taken to the best clubs, best hotels and restaurants. He'd also get it all for nothing."
Mark was previously engaged to his former co-star Lauren Googder in 2011, but the pair split not long after.

Gwyneth Paltrow is planning on joining Coldplay on tour.
The 41-year-old actress wants to travel with the band so her children Apple, nine, and Moses, seven, can spend time with their dad Chris Martin when the band kick off their tour in May in support of their sixth studio album, 'Ghost Stories', despite the pair announcing they were going to 'uncouple' last week.
A source told The Sun newspaper: "Gwyneth has pledged to travel with the band.
"She's determined to keep things amicable and joked that she'll be their roadie."
It has recently emerged Chris is keen to work on their relationship in an attempt to save their 10-year marriage and is hoping to reignite the flame they used to have.
A source previously said: "Chris still loves Gwyneth and would still like the marriage to survive.
"He hopes they might be able to rediscover what they had years ago and would love to rebuild their relationship back to what it once was."
They also plan to live in their Miami home, but in separate wings.
Meanwhile, Chris and Gwyneth were spotted having dinner with friends just days after announcing their split.
An insider recently said: "You would never have guessed they had just split up. They looked like they were getting on OK, but perhaps it was a little strained.
"Chris seemed in good form and was telling lots of jokes. Gwyneth pulled a few faces but it was all in good spirits."

Lady Gaga's dancers gave her a sex toy for her birthday.
The singer celebrated turning 28 backstage after her Roseland Ballroom show in New York City on Friday (28.03.14) and her dancers sang her 'Happy Birthday' before presenting her with gifts.
According to The New York Post newspaper, presents included a pink sex toy, a riding crop and a sexy lingerie set with heart cutouts in intimate areas.
Her friend Lady Starlight, who opened the gig, gave her a cake in the shape of a giant shoe that said 'G.U.Y.' - which is the name of her newest single.
Gaga was also joined by artist Jeff Koons and James Franco, who posted an image of the two of them on Instagram which he captioned "HAPPY BDAY, GaGA!!!! (sic)"
Following the show the blonde beauty spent time with boyfriend Taylor Kinney.
She wrote on Twitter: "Another amazing birthday moment. I love surprises! (sic)"
and attached an affectionate black and white image of the pair of them where he is leaning in to kiss her while she poses for the shot.
A source also overheard Starlight saying Gaga - real name Stefani Germanotta - would likely marry Kinney.
Gaga clearly had a fabulous birthday and thanked her fans for their wishes.
She tweeted: "Thank you so much for all my beautiful birthday wishes. I feel like luckiest girl in the world this birthday. (sic)"

Kodaline find it difficult not to drink every night on tour.
The Irish rock band - made up of Steve Garrigan, Jason Boland, Vincent May and Mark Prendergrast - have just finished a UK tour and admit they found it hard to stay sober after the shows.
Guitarist Mark told BANG Showbiz: "It's tough not to drink every night on tour ... that sounds really Irish and alcoholic. Before you go on stage you warm up and have a stretch, but you also have a gin and tonic.
"I'll have one [before] to calm the nerves but then it's tough to go to bed early. You're on a bus with 15 lads and all they wanna do is stay up and party.
"You just get used to having a hangover and it turns into being drunk again."
Being Irish means they predictably like pints of Guinness and make sure there's plenty of the black stuff to go round backstage when they perform in Ireland.
Mark added: "On the rider there's usually a couple of beers but whenever we're playing in Ireland we have a keg of Guinness backstage and it's hard not to have one before you go on. "It's too much fun in Ireland, everyone is up for it all the time. I do miss it."

Celine Dion's role in the 'Muppets Most Wanted' was scripted with her in mind.
The film which stars children's favourites Kermit the Frog, Miss Piggy, Animal and Fozzy Bear among others, has a number of A-List cameo appearances, including Salma Hayek, Tom Hiddleston and Usher, and director James Bobin insists the roles were written specifically for these celebrities, before they officially agreed to appear in the film.
He said: "Largely we write those roles in the script. Often we even write the name of the particular person. What we find, is that because there's a great love for the Muppets the people we ask tend to say yes. Which is really rare.
"It's amazing where we write a number for Piggy and we have someone to be her fairy Godmother, her spiritual advisor about love and relationships. You think who would be amazing, maybe Celine Dion, and then you phone her up and she's like 'Yeah, I'll definitely do that, no problem'. It's amazing, that never happens."
'Muppets Most Wanted' also stars comedian Ricky Gervais, Modern Family's Ty Burrell and Tina Fey in lead roles.

A letter written by the late John Lennon to producer Phil Spector has sold at auction for £53,000.
The Beatles star penned 'A Matter Of Pee' in the 70s to complain about Keith Moon of The Who and singer-songwriter Harry Nilsson urinating on the studio mixing desk and claimed he left the studio before the incident.
According to The Sun newspaper, the letter was sold to a private collector by London auction house Cooper Owen.
The letter - which he wrote with red ink - reads: "Should you not know, it was Harry and Keith who p****d on the console!
"Tell (the studio owner) to bill Capitol for the damage, if any?
"I can't be expected to mind adult rock stars, nor can May [Pang]. Besides, she works for me, not A&M.
"I'm about to piss off to (rival studio) Record Plant because of this crap."
John was shot by Mark David Chapman in New York City on 8 December 1980 when he returned from Record Plant Studio with his wife, Yoko Ono.

Chelsea Handler will quit her US talk show when her contract expires.
The 39-year-old star has hosted 'Chelsea Lately' for the past eight years, where she has an average viewership of 572,000 a night, but intends to leave the programme in nine months time and has a number of offers for work coming in from elsewhere.
The host's manager Irving Azoff told The Hollywood Reporter: "Chelsea intends to leave when her contract expires. She hired me to figure out her life after E! We have at least seven suitors and many ideas."
Chelsea - who is believed to make around $9 million a year from the show - has previously voiced her concerns about the E! network and described it as "a sad, sad place to live."
Before adding: "They don't know what they're doing. They have no ideas. It's a failure."
A source at one company on the list to meet with her believes those remarks may affect her chance of getting work in the future.
The source said: "When you see talent go after a network like that, you think one day it could be me."
E! have refused to comment on the blonde beauty's future.

Keira Knightley says acting helps her build who she is.
The 29-year-old actress - who was catapulted to the spotlight after starring in 2003's 'Pirates of the Caribbean' - still gets nervous when she's preparing for a role and believes she's continually learning from her experiences in the industry.
She said: "I'm still just as stressed out when I start a film shoot and I'm not happy with everything that I do.
"But with time and each new film, I continue to learn, unlearn and learn again. And therefore to build who I am."
Although Keira's alter-egos have always been in "horrific" situations and suffered a tragedy, the screen beauty is excited about her new role in 'Begin Again' where her character has "positive vibrations".
Talking to DuJour magazine, she said: "After 'Anna Karenina', I suddenly realised that for the past five years, in all of my films, I either died or was subjected to situations that were each more horrific than the last.
"So I wanted more positive vibrations!
"And nothing could correspond better than this New York fairy tale of a young woman who tries to finally have the life that she always wanted."

Brandi Glanville's son was rushed to hospital earlier today (30.03.14).
The TV personality - who has sons, 10-year-old Mason and six-year-old Jake with ex-husband Eddie Cibrian - was left concerned when she had to seek medical attention for her eldest child while in New York where she's busy with promotional appearances.
She wrote on Twitter: "8 hours in the ER this trip to NYC Mason will never forget! 1st trip in an ambulance! All will be fine (sic)".
Alongside the post Brandi added an image which shows Mason's arm with medical equipment attached.
The screen beauty was thrilled with the care and attention given by medical staff who helped save Mason's life.
The 41-year-old star - who is best known for 'The Real Housewives of Beverly Hills' - gushed: "Just want to thank all the hard working Dr. Nurses & EVERYONE that put up with my crying panicked ass and help save my babes life! (sic)"
Before responding to concerned fans, and added: "Thanks for your we'll wishes regarding Mason he is doing a lot better and all will be fine! (sic)"

Rosie Huntington-Whiteley is glad "disgraceful pictures" from her early career aren't online.
The 27-year-old beauty - who was catapulted to the spotlight after signing with Victoria's Secret in 2006 - admits there are an "archive" of images taken when she first began modelling which she'd rather not share.
Speaking at the Vogue Festival, she said: "I've seen the best and worst parts of the industry.
"I've gotten to be exposed to some not so fabulous photographers. There is definitely a real archive of disgraceful pictures.
"They don't actually exist on the internet because they are so old, thankfully they happened early on in my career."
Rosie - who is dating hunk Jason Statham - was initially told modelling "wasn't the world for her" and although she has succeeded she's "learnt" from previous mistakes.
She added: "I try not to regret things generally in life because generally it is something you really wanted to do at the time.
"You learn from mistakes and move on. There is no way you can learn otherwise."