Stacy Keibler and Reese Witherspoon Credit: Chelsea Lauren/WireImage.om; Dimitrios Kambouris/Getty

- Stacy Keibler and pal Jenna Dewan-Tatum celebrating Cinco de Mayo together at Pink Taco

- Russell Brand drinking Activate water while performing at Nancy's Garden Party Fundraiser

- Janet Jackson hanging out with a group of her dancers at Hyde Lounge

- Gerard Butler enjoying a leisurely lunch at Scarpetta

- Ryan Phillippe exploring the Neff Hope Sesame Street exhibit

- Enrique Iglesias and Jennifer Lopez celebrating at an Atlantico Rum-hosted bash in L.A.

- A pregnant Reese Witherspoon drinking juice while pal Chelsea Handler downed cocktails at Chateau Marmont

- Minka Kelly browsing the racks of Jenni Kayne's boutique in L.A.'s Brentwood neighborhood

- Kirsten Dunst enjoying afternoon shots with boyfriend Garrett Hedlund at the Four Seasons Hotel

- Rihanna covering Bob Marley's "Redemption Song" at EIF's Women's Cancer Research Fund event