Kate Hudson went shopping in Los Angeles on Friday, and though she sometimes goes for the beach babe look, this outfit was straight up city chic! The 37-year-old starlet showed off her slender legs and cleavage in a soft pink dress and sky high heels, and but later in the day she went even sexier for BFF Nicole Richie's disco-themed 35th birthday bash.

Kate slipped into a revealing black number, and she grooved with pals like Jessica Alba, Rachel Zoe and Jen Atkin to all kinds of throwback tunes. At the party, Kate also attempted to teach Nicole's hubby Joel Madden to use Snapchat, but that was kind of a bust. "I need to go home," she captioned the shot below after trying to explain Snap to the rocker. "This is gonna take weeks."

And speaking of boobs, is that what we think it is? Also, why does Nicole look like Lady Gaga here?