Standing by her man!

Just a day after reports surfaced about their rocky marriage, Nicole Richie stepped out to show support for husband Joel Madden, 36, at his Good Charlotte concert in West Hollywood, Calif., on Thursday night.

RELATED: Nicole Richie Trying For Another Baby to Save Marriage to Joel Madden

nicole richie and joel madden good charlotte concert

The 34-year-old mother-of-two has allegedly been at war with Joel over his flirting with other women. As Life & Style previously reported, the couple "got into a nuclear fight about it,” especially over his close relationship with singer Jessie J.

RELATED: You Won't Believe What 'Bang Bang' Singer Jessie J Can Do With Her Mouth!

Sister-in-law Cameron Diaz, 43, joined the pair on date night to watch husband Benji Madden, 36, who also performed. No doubt the actress is offering Nicole support as she struggles to deal with divorce speculation.

cameron diaz and benji madden

But it looks like the reality star isn't letting the rumors get her down!