Instead of celebrating Tuesday's release of her debut album, Based on a True Story, Lil' Mo will be resting and recuperating after being hit over the head with a champagne bottle on Friday.

The 4'11" singer, born Cynthia Loving, was attacked by a male as she was getting into her limo, which was parked outside the backstage area of the Warfield in San Francisco, according to a police report. She had just performed at the venue.

Mo was treated at California Pacific Medical Center, where she received 20 stitches. She is doing fine but is a little shaken up, according to a spokesperson for the singer.

"For this to happen on the eve of the most exciting week of Mo's career makes us all doubly sad," read a statement from the singer's label, Elektra Records. Mo has canceled all of her public appearances through June 29 as she has to follow up with her doctors, the label said.

A police spokesperson could not offer any further details about the investigation.

For a full-length interview with Lil' Mo, check out "Lil' Mo: Moment Of Truth".