Credit: All Access Photo / Splash News Photo: Derek Hough and Julianne Hough in LA on June 25, 2013

Watch out, world! When Derek Hough and his sister Julianne Hough get together, things are going to get crazy! And we are not complaining.

The Dancing With the Stars siblings hit up the Svedka Splash of Summer party in Los Angeles last night (June 25) and wearing matching colors is the least wild thing they did all night.

Derek took to Instagram posting a photo of a pool filled with beach balls. Along with the pic, he wrote, "Had a blast dancing in the flash mob at the @svedka party tonight #svedkasplash." The things we would do to watch Derek and Julianne shake it in a flash mob!

And that's not all. Julianne also posted a photo on Instagram showing off her gaming skills. In the pic, she and a friend are playing with a life size Jenga set! This is our kind of party.

Check out the photos from the event and then sound off in the comments! 

Credit: Julianne Hough Instagram Photo: Julianne Hough Plays Jenga