Little Mix gave fans a big pre-holiday surprise during their joyful set at Capital FM's Jingle Bell Ball last night in London. While performing "Secret Love Song," one of the tracks off their latest album Get Weird, the girls invited Jason Derulo out onto the stage to perform his guest vocals on the track with them live for the first time ever. Watch below:

In addition to inviting the R&B singer onstage, the Little Mix ladies also announced prior to the performance that "Secret Love Song" would indeed be their next single in the U.K. and Ireland.

"So we have an exclusive for you,” Little Mix reportedly told the sold out O2 Arena crowd prior to the performance, adding, “We know you'll enjoy a cheeky little surprise! This song is going to be our next single. We hope you enjoy it.”

Later, the girls re-confirmed the news on their Twitter page, along with a cute video where they excitedly gushed about getting to perform with Jason for the first time:

Aside from "Secret Love Song," the beloved British girl group performed a selection of their hits during their sparkling six-song set, including kicking things off with "Salute," "Move," "Wings," "Love Me Like You," and their massive hit single from this year, "Black Magic." Lets hope that "Secret Love Song" can reach the same incredible heights of the latter song!

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