When Justin Bieber was asked for Rihanna`s number

London: Singer Justin Bieber was surprised when one of his friends asked him for Rihanna`s phone number. "The lads are really cool. We stay in touch. You can`t tell your bro`s secrets, but one of them did text me asking if I could introduce them to Rihanna," dailystar.co.uk quoted the 18-year-old as saying. "I can`t say which one. He is a great guy, so if Rihanna wants herself a younger man he could be in with a shot," he added. IANS