Watch: Harry Styles Covers Ariana Grande & One Direction on Tour

Harry Styles kicked off his first solo tour in California this week. Fans gathered to hear him sing his solo hits such as "Sign of the Times" and "Two Ghosts," but they were in for a real treat.

The star covered Ariana Grande's song "Just a Little Bit of Your Heart," which he co-wrote, at his show in San Francisco. He also gave One Direction fans a little surprise by singing the boy band's hits "Stockholm Syndrome" and "What Makes You Beautiful." Take a listen to the songs below!

Harry Styles - "Just A Bit Of Your Heart" Ariana Grande Cover

Harry Styles - "Stockholm Syndrome" One Direction Cover

Harry Styles - "What Makes You Beautiful" One Direction Cover

At the tour's second stop in Los Angeles, One Direction bandmate Niall Horan attended the show. Watch this short video of him enjoying the concert here!

Looks like Harry's tour is the must see event of the fall!