To celebrate Rihanna's birthday, we're counting down her top twenty Billboard hits.

This week Paul McCartney released his 23rd post-Beatles album, was awarded a star on the Hollywood Walk of Fame and covered Billboard magazine. In honor of Sir Paul's accomplishments, we bring you his 40 Biggest Billboard Hits, from the Beatles to Wings to his solo material.

As we fondly remember the life of George Harrison on the tenth anniversary of his passing, we celebrate his 10 biggest Billboard hits, from his Beatle days to his thriving solo career.

The fashion and music worlds have never exactly stayed in their separate corners, so it comes as little surprise when models become the visual muses for our favorite rockstars.