Pop star Avril Lavigne has vowed to fight any girl who tries to steal her rocker husband Deryck Whibley. The Sk8r Boi star is fiercely protective of her relationship with the Sum 41 frontman and has a warning for any groupies with designs on him.

Lavigne says, "If some girl was going after my man I'd punch them. I don't think stealing any girl's guy is a nice thing - it's totally mean."

- Avril Lavigne Pictures
- Sum 41 Gallery

(This news article provided by World Entertainment News Network)