The was a special season premiere episode of Lip Sync Battle (Season 4, Episode 1) .

: Performed a tribute to Aguilera's hits, including a highly choreographed routine.

: Aguilera served as the first guest judge, famously surprising the queens by entering in Farrah Moan -inspired drag.

: The top two queens, Monét X Change and Trinity The Tuck , competed in a final "Lip Sync for Your Legacy" to Aguilera's anthem "Fighter" .

Watch the iconic moment Christina Aguilera performed 'Fall In Line' live with legendary queens from RuPaul's Drag Race:

: Made a surprise appearance on stage to perform alongside the competitors. Related Drag Race Crossovers

The episode featured a head-to-head competition between and Erika Jayne , with a surprise guest appearance by Christina Aguilera herself. Key Performances

: Aguilera performed "Fall In Line" live with a crew of Drag Race stars, including Sasha Velour and Farrah Moan.