Addison rolls to L.A.

Katherine Heigl and T.R. Knight from the 2007 Young Hollywoood Awards.

Katherine Heigl lights up a room - and in this case, the Sundance Film Festival.

Derek, Richard and Preston prepare to embark on a manly weekend.

Katherine Heigl poses for the cameras jokingly.

Addison examines a patient as Meredith watches.

Addison and Derek share a laugh.

Carrie Underwood is set to guest star on How I Met Your Mother. We can't wait to see that!

Ready for season nine of American Idol? These posters are meant to get fans in the mood.

Fox has released this poster for season nine of American Idol. We'll be watching. Will you?

Clay faces some trouble on the episode "Balm." Agent Stahl appears on to SAMCO during this installment of the show.

It's the girls vs. the boys on the Glee episode "Vitamin D." Who will come out on top?!?