Jessica Alba may have just taken the crown as Hollywood's leading lady you'd least want to mess with.

If someone gives Khloe Kardashian a run for this money as the top celebrity gym rat, it's Alba. A frequent uploader of post-workout and yoga session pics on Instagram, Alba took her gym selfie game to whole different level this afternoon with this boxing video. With No Dount blurring in the background, Alba put a punishing on her poor trainer going through a series of hooks, jabs and combinations that made us cringe.

Check out Jessica Alba's latest gym documentation in the video below and keep it with Sneaker Report for all your celebrity fitness news.

#imjustagirl @nodoubt y'all #kravmaga