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Okay, so we don't know for sure if this guy's really Britney's new man, but riddle me this -- would her real estate agent be helping her look for a new house over drinks at Sunset One and Winston's?

Justin Mandile, 25, a real estate agent who works on his dad Drew's team at Sotheby's Beverly Hills, is the mystery man who escorted Brit to the clubs Saturday night.

Justin (love the name, no?) went to the prestigious Buckley School with Paris and Nicky Hilton and has gone on to make some pretty decent real estate deals as an agent in one of the most prestigious realty offices in LA.

Ya think this Justin would be a good match for Brit?