Which rocker has made Dermot O'Leary 'the happiest man alive'?
Dermot O'Leary rubs shoulders with the glitterati every day.
But the X Factor host is clearly as starstruck as the rest of us when he gets to meet one of his idols.
The TV star looks giddy with glee in a snap he has shared showing him meeting rock heavyweight Bruce Springsteen.
Dermot captioned the shot: "So... pretty much the happiest man alive right now. #domeetyourheroes."