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After a night of partying at the Roosevelt in Hollywood ... what's a young celebrity couple like Emma Roberts and Chord Overstreet to do? Keep partying!

Emma and her beau Chord left the Hollywood hot spot minutes apart, but it didn't keep the twosome from reconnecting inside their awaiting ride ... of course, with more friends joining them.

But as they say, the night was young! The group then stopped at the Laurel Canyon Country Mart to stock up for their after party. Woot, woot!

See Emma's oh-so-chic LA style ... after the jump.