One Direction racked a up a mobile phone bills of £14,000 while on tour recently.
Louis Tomlinson, Harry Styles, Zayn Malik, Liam Payne and Niall Horan have been promoting their music in North America, Australia and New Zealand but created huge roaming charges by keeping in touch with fans and loved ones.
Apparently calling and texting the UK as well as staying connected on the internet to use Facebook and twitter meant the boys ended up spending thousands collectively.
An insider at Simon Cowell's Syco label told the Mirror: ''Like most teenagers, the boys are obsessed with all things social media.
''They're also encouraged to tweet by management to keep them interacting with fans but Niall and Liam in particular got pretty homesick during their travels and regularly called home.
''When the bills landed on their doormat, the guys were utterly stunned and slightly devastated thinking they'd have to fork out themselves.
''In the end they got called in for a meeting and given a lecture on finances, and how to handle their money.
''It is vital wealth does not go to their heads. Their bills got signed off and the boys will not be making the same mistake again.''
Simon agreed to pay the charges as a thank you to celebrate the group's success.
Since coming third on 'The X Factor' in 2010, each member is believed to have taken home £400,000.
However next year's royalties are due to make them millionaires.