Ashlee Simpson takes Evan Ross relationship public

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After reports they vacationed together in Cabo and were photographed holding hands in Los Angeles, Ashlee Simpson and Evan Ross, son of singer Diana Ross, have taken their relationship public. The couple appeared together at the launch of Ashlee's sister Jessica Simpson's fashion line.

Ashlee hosted the event, and is one of the faces of the brand. The appearance comes on the heels of Simpson reprising her Broadway role of Roxie Hart in a Hollywood Bowl production of "Chicago," which ran July 26-28.

Before Ross, Simpson dated "Boardwalk Empire" star Vincent Piazza. She was formerly married to Pete Wentz, with whom she shares a son.
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