Singer Harry Styles' friends were banned from using micro-blogging website Twitter at his birthday party.

At his 21st birthday Jan 31, Styles was joined by some A-list friends at his extravagant celebrations at Lulu's Cafe here. Those present were forbidden from using the website so that details about the exclusive event remained a secret, reports mirror.co.uk.

His former girlfriends Kendall Jenner and Cara Delevingne attended the 200,000 pounds celebration, even though the crooner's latest love Nadine Leopold was present at the bash.

"He's such a charming guy, even his exes want to be around him. It's a credit to his good nature that girls he has dated all wanted to come and help him celebrate," said a source.

The entire venue was hired out and those who attended were treated to an instant photo-booth, karaoke and cupcakes.

Further guests included David Beckham, Jennifer Lawrence and Adele.