Cara Delevingne, Instagram

Not planning on tuning in to the Victoria's Secret fashion show tonight? Well, let Cara Delevingne give you a litle preview of what you'll be missing.

The 21-year-old stunner took to Instagram today to amp up excitement ahead of the annual fashion show, which was recorded last month but is set to air on Tuesday, Dec. 10 at 10 p.m. on CBS.

"I was saving this ass video until last! Take it away @doutzen @joansmalls @victoriasecret check out the #VSfashionshow playing tonight! X," Delevingne wrote on her Instagram page, tagging her fellow angels Doutzen Kroes and Joan Smalls in the post.

The video features a few of the angels twerking up a storm and doing their best booty pop for the camera (seriously, Miley Cyrus, you've got some competition) as Cara yells "turn it up" and "bubble butt" while filming the beauties.

If you follow the model-of-the-moment on Instagram, then you know the clip is a follow-up to her first video from the fashion show, in which Cara, who is known for her sassy sense of humor, filmed only the enviable backsides of the angels, including Candice Swanepoel, Behati Prinsloo, Constance Jablonski, Sigrid Agren, Alessandra Ambrósio, Lily Aldridge, Doutzen Kroes, Karlie Kloss, Toni Garrn, Caroline Brasch, Monika Jagaciak, Jessica Hart, Kasia Struss, Kelly Gale, Jourdan Dunn, Joan Smalls, Lily Donaldson and Adriana Lima, and hilariously captioned the clip, "whose ass is that?"

The sassy starlet even shared a friendly butt slap on stage with the show's musical guest Taylor Swift, who also happened to date Delevingne's reported ex-flame Harry Styles. The pair, of course, now appear to be BFFs.

Victoria's Secret Fashion Show, Cara Delevingne

Jennifer Cooper, E!

Tune in tonight to watch the country crooner belt out her hit "I Knew You Were Trouble" while a bevy of the VS beauties all strut their stuff on the catwalk in barely-there attire.

One thing's for sure: There's bound to be lots of bras and booty on the boob tube tonight.

Are you excited for the VS fashion show? Tell us in the comments!

PHOTOS: 2013 Victoria's Secret Fashion Show

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