Derek Hough Didn't Know Who Bethany Mota Was Before 'DWTS'

Bethany Mota heads into the dance studio in a hot pink tee for Dancing With The Stars in Los Angeles on Saturday afternoon (September 13).

The 18-year-old YouTube guru joined partner Derek Hough inside after stopping to say hi to fans outside.

“As I’m sure you know, Bethany Mota is my partner. I’ll be honest – I didn’t know exactly who she was. After producers told me she was my partner, I looked her up, and she’s amazing,” Derek blogged for his TVGuide column. “I’m in awe at what she’s accomplished at such a young age. She’s actually the youngest partner I’ve ever had too. She’s just an absolute sweetheart. I love what she stands for and what she’s built – and that her fans call themselves the Motavators! It’s pretty remarkable what she’s done when you think about it.”

He added, “Our first dance is the jive and Bethany’s doing great. She doesn’t have any dance experience except for the usual dance classes you take when you’re a kid. She’s a real natural and I think it’s gonna be a great premiere.”

20+ pics inside of Bethany and Derek…