• (L-R) Actresses Blake Lively, Alexis Bledel, America Ferrera, and Amber Tamblyn pose for a photo during MTV's Total Request Live at the MTV Times Square Studios August 4, 2008 in New York City.

(L-R) Actresses Blake Lively, Alexis Bledel, America Ferrera, and Amber Tamblyn pose for a photo during MTV's Total Request Live at the MTV Times Square Studios August 4, 2008 in New York City. (Photo : Getty Images / Scott Gries)

A true sisterhood battle will be happening in a new season of "Lip Sync Battle," courtesy of Amber Tamblyn and America Ferrera.

Filming of the upcoming season continues and followers get a preview of who will be the next famous stars to compete in Spike's series. It comes out an upcoming mashup will delight all fans of "Sisterhood of the Traveling Pants."

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Last month, the two song birds Tamblyn and Ferrera were with Blake Lively and Alexis Bledel for some bonding moments. The four actresses were in the 2005 and 2008 "Sisterhood of the Traveling Pants" films.

Tamblyn, Ferrera, Lively and Bledel shared the reunion by posting their selfies on Instagram. Now, two of them will be singing on television, competing for the crown on a new episode of the "Lip Sync Battle."

Ferrera and Tamblyn previously did lip-synced together on the Fourth of July, performing Beyonce's "Formation." They announced their upcoming singing competition on Instagram, with Ferrera using the hashtag #DuelingSisters. While the latter cannot wait to show to everyone the craziness, she wondered what kind of stuff they got themselves into.


To such post, Tamblyn replied she thought maybe they killed it. The actress posted a picture of host L.L. Cool J. The duo have been extra close, together with Lively and Bledel since they started filming in 2005.

Tamblyn once shared that there is no competition among her friends, even though they are women. They decided to love and support each other onscreen and offscreen. Hence, it does not matter for the two stars who will win in the singing competition.

There are hopefuls the quartet will make a movie again. However, either the project is not happening or there is little information about it.

"I have no information about that right now," Tamblyn told E! News regarding a release date. "But I can obviously tell you that something is definitely in the works."

Meanwhile, the Carmen Lowell actress previously confirmed to PEOPLE that a third part of their movie is in the works. Ann Brashares' novel of the same title, on which the film is based has a fifth book. It focuses on the raw and honest friendship and how it changes as friends grow up.

Watch the film that brought Ferrera, Tamblyn, Lively and Bledel together.