H'wood Party Girl

Joel Madden took the whole family with him to the desert this weekend for Coachella, where he was deejaying at the BPM Hpnotiq House.

"We're all here," Joel told E!, revealing his weekend plans with Nicole Richie and baby Harlow. "We have a nice little house. We're just sitting by the pool. It's really relaxing. We are going to stay the whole weekend."

While Nicole was on hand to support her man as he spun, they wisely left little Harlow back in their rented pad. Joel was overheard telling fellow party guest Taryn Manning that Nic is a super mom and he's proud to be with her. All together now...awww!

The new mama certainly seemed to be enjoying herself, as she danced with friends and goofed around while hanging poolside. Nic looked Coachella cazh, in a white flowy top, denim cutoffs and red heart-shaped sunglasses.

Joel also dished that it was his very first Coachella, although Nicole's a veteran to the annual music fest in Indio. Geez, Harlow's not even a year old and she's already at Coachella?

She's obviously way cooler than us.

(Check out more Coachella action in our photo gallery.)

—Additional reporting by Claudia Rosenbaum and Whitney English