Simpson bulks up for boxing video

Ashlee Simpson took intensive boxing lessons in preparation for her latest music video, which is inspired by the film Million Dollar Baby.

The 21-year-old appears as a female boxer in the promo for new single Invisible.

She explains: "We took boxing lessons before the shoot to make it look real."

The Love singer even took a brutal blow to the face while filming the clip: "I got hit hard on the chin! (In the video) I get knocked down, but keep getting back up. I can relate to that!"