The "L" in TLC might not stand for rapper Lil' Mama, but she will take to the stage with the remaining members of the girl group when they perform at the American Music Awards Sunday.

The Lip Gloss singer is rumored to be joining in with Tionne "T-Boz" Watkins and Rozonda "Chilli" Thomas for a rare performance. The last time TLC performed on an awards show was at the 2000 Grammys. 

The band's news account on  Twitter (@OfficialTLCNews) revealed the surprise performer Thursday by posting, "The special guest that'll be performing with TLC at the American Music Awards this Sunday will be Lil' Mama." However, when asked about the news by a fan, it replied and said it was just speculation.

Fans have been waiting with anticipation on who the secret performer will be since the group's official Twitter page (@TheReal_TLC) posted Wednesday, "[TLC] is performing at the American Music Awards this Sunday with a special guest! Any guesses on who that may be?"

Lil' Mama played the late TLC band member Lisa "Lefteye" Lopes in the CrazySexyCool: The TLC Story biopic, which aired on VH1.

Others performing at the AMAs include Jennifer Lopez and Katy Perry.

Sunday's stage act will not be the first time Lil' Mama performs with TLC. They collaborated in October at Drake's OVO Festival in Toronto and again in July at VH1's Mixtape Festival in Hershey, Penn.

TLC also announced on Thursday that the band has been dropped from the label Epic Records.

While T-Boz and Chilli have stayed silent about the speculation, the group's Twitter page wrote, "Right before an album is about to drop something crazy always happens. Waiting on the official press release statement."

They also added, "With all the crazy label drama, let's not forget to support TLC this Sunday!"

The American Music Awards airs live on ABC Sunday at 8/7c.