JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
Not many orchestra performances can be called "booty-shaking," but the Seattle Symphony is willing to take on that challenge.
Friday night, rapper Sir Mix-A-Lot joined the orchestra onstage to perform two of his biggest hits. After finishing "Posse on Broadway," Mix invited about 40 women to to take the stage and shake it to "Baby Got Back."
Check it out below!