i dnt actualli no the exact name of the song u want, but i found this list of the songs in the film, so maybe it may help u find it!
Mean Girls Movie Soundtrack
"Beautiful" - by Linda Perry, Performed by Daniel Franzese
"Overdrive" / Katy Rose
"Rip Her To Shreds" / Boomkat
"Built This Way" / Samantha Ronson
"Operate" / Peaches
"The Mathlette Rap" - Lyrics Tina Fey, Music by Gabriel Rene,
Produced by Gabriel Rene, Performed by Rajiv Surendra
"One Way Or Another" / Blondie
"Hated" / Nikki Cleary
"Misty Canyon" / Anjali
"Jingle Bell Rock" - by Joe Beal & Jim Boothe
hope this helps ya!
Gemz x x