Guys have been known to lose their train of thought when a knockout enters the room. Nothing is worse though than forgetting her name. So here's a true test fellas. You've seen 'em on billboards, you've seen them in your magazines, but can you name these beauties?

This pop princess has been a fixture on the charts since being discovered by hip hop mogul Jay-Z. You've heard her hits, you've seen her videos but how well do you know your Rihanna?

We quiz you on the juicest bits of gossip for the week ending May 31, 2009. Have you been paying attention to the week's headlines?

Museums are great sources of inspiration, particularly for filmmakers. As Ben Stiller gears up to spend a night at the Smithsonian, we quiz you on the great halls of films past. Take our Movie Museums challenge.

Not every celeb couple is the meeting of equals and few have the collective star power of Brangelina and Bennifer. While you may have seen these faces in passing, how well do you know the significant others of these significant A-listers?

With "Angels & Demons" now in cinemas, three years after the Da Vinci Code's theatrical release, we wonder how well you remember the first film and the book that started the craze. Take our Da Vinci Code challenge before seeing Ron Howard's new follow-up flick in cinemas.

So you think you know Star Trek? BAKTAG! See how well you'd do at Starfleet and put your Trek knowledge to the test.

They say that it's a launching pad, even for those who don't win. But how well do you remember these faces from Idols past?