Julianne Hough Lip Sync Battles Brother Derek in Central Park

Julianne Hough and her brother Derek dress up in costume while performing for the crowd on Lip Sync Battle Live at SummerStage in Central Park on Monday (July 13) in New York City.

The Dancing With the Stars siblings were joined by hosts LL Cool J and Chrissy Teigen.

Derek reportedly performed Macklemore and Ryan Lewis‘ “Can’t Hold Us” and The Darkness‘ “I Believe in a Thing Called Love.”

Meanwhile, Julianne reprised her performance of The Lonely Island‘s “I Just Had Sex,” as well as the Chumbawamba classic “Tubthumping.”

It turns out Derek beat Julianne!

FYI: Julianne is wearing 3×1 denim cut-off shorts.

45+ pictures inside of Julianne Hough and Derek Hough battling each other…