Justin Bieber shops for mother's day

Justin Bieber not only knows how to woo the ladies, but he also knows how to treat his mom on Mother's Day.

Bieber caused quite a stir Sunday as he took his mom shopping at The Grove mall in Los Angeles.

"I'm here shopping for my mom to celebrate Mother's Day," Bieber told E! News when asked why he was standing in the all-female clothing store chain, Forever 21.

The singing sensation, who