AceShowbiz -

The Pussycat Dolls will participate in wrapping up the fourth season of "The Hills" that will air on MTV on December 22. The dancing and singing troupe will take the stage during the live after-show, singing their latest "Doll Domination" single, "I Hate This Part".

The Dolls' performance is the concluding part of the whole "The Hills" special screening event at Tavern on the Green, New York that day. Their segment, "After Show", will begin 10.30 P.M. ET/PT with hosts Jessi Cruickshank and Dan Levy getting "reactions from the cast immediately following the season finale" while "fans will have the opportunity to ask all the probing questions on everyone's minds."

The event which is dubbed "The Hills Finale Live From NYC" will begin with a pre-show at 8 P.M. ET/PT, hosted by Tim Kash. The season finale will be screened afterward at 10 P.M., showing that when Lauren Conrad and Heidi Montag have a run-in and put their feud aside, Spencer Pratt and Heidi deal with the fallout of their elopement, and Justin shocks Audrina Patridge when he whisks her away to Palm Springs for his own surprise. More about the event, log on to MTV.com.

Meanwhile, The Pussycat Dolls will embark on a tour with Britney Spears starting March 3 in New Orleans. On being the pop star's opening act, the group's Ashley Roberts revealed to MTV, "Some of us heard on Halloween night. We were all in our costumes, and we're like, 'We're opening up for Britney Spears! That's so cool!' I think we all screamed and jumped a little bit."