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X17 broke the story of Britney and romantic rocker Howie Day hitting it off on the tennis courts at Promises and now X17 brings you the XCLUSIVE pix of the two outside of rehab and still hitting it off!

Brit and Howie met up at The Bridge, one of Britney's favorite restaurants and then drove by nightclubs Element, Les Deux, and Parc before stopping at Teddy's.

The handsome couple went inside and did who knows what and then went back to Brit's house (with Howie at the wheel of Britney's Mercedes) and did who knows what!? Our photogs were there until 5 am and Howie still hadn't left ...