There's no rivalry between the most popular girls from West Beverly High!

Beverly Hills, 90210 alum Jennie Garth, 40, and current 90210 star Shenae Grimes, 22, bonded at the Live in Pink party in West Hollywood August 15. Garth -- who a source says lost 20 pounds in three months -- looked radiant in LOFT's pink chiffon dress with a neon yellow belt, while Grimes paired a LOFT blazer and pink lace tee with a Recreation skirt and a vintage necklace.

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The party, hosted by Giuliana Rancic, 36, benefitted the Breast Cancer Research Foundation. "I'm a big fan of Giuliana's," Grimes told Us Weekly. "I appeared on Fashion Police earlier this year and she was so warm and lovely. She's got such an amazing personality and she's so resilient. She's really put a face to the cause." (E! News co-host and Style Network reality star Rancic underwent a lumpectomy, radiation and a double mastectomy after being diagnosed with breast cancer in the fall of 2011; she is currently in cancer-free.)

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The party wasn't the first time Garth has spent time with her younger 90210 counterpart. For 20 episodes beginning in 2008, the actress reprised her role as Kelly Taylor on the CW reboot of the original Beverly Hills, 90210. Garth even shared screen time with her former costar Tori Spelling, 39, who played good girl Donna Martin.

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Garth exited 90210 in 2010, two years before she and husband of 11 years Peter Facinelli, 39, decided to end their marriage. The actress, who briefly romanced HGTV's Antonio Ballatore in the spring of 2012, is currently dating photographer Noah Abrams, two sources confirm to Us. "She's been going on dates," one insider says. "She's not looking to get into anything too serious too fast."

This article originally appeared on PIC: Jennie Garth Bonds With 90210's Shenae Grimes!