Wanda Sykes tries out late night.

Taylor Swift is host and musical guest.

Will the finale be full of shockers?

Khloe gets hitched to Lamar Odom.

Seth MacFarlane hosts a variety show.

Country singer Kellie Pickler lends a hand.

Which tool will be the winner of $100,000?

Cleveland Jr. decides to be celibate.

Gavin Rossdale cameos as a rockstar.

Mandy Patinkin guest stars as an organ donor.

Will Forte guest voices as Principal Wally.

Pop sensation Lady Gaga appears as herself.

Tricia Helfer guest stars as Chelsea's friend.

Heather Locklear returns as Amanda Woodward.

Tim Gunn and Tabatha Coffey give makeovers.

Edward Norton guests as musician Izzy LaFontaine.

Jennifer Grey guest as Richard's blind date.

Jonah Hill guest stars as a man-child.

Eve guest stars as a choir director.

Lisa Kudrow guests as a mean dermatologist.

Singer Shakira guest stars as herself.

Elisabeth Moss guests as a cancer patient.

Brian Williams returns for another cameo.

Megan Mullally guest stars as Ron's ex-wife.