Credit: Jason Kempin/Stephen Lovekin/Getty Images Photo: Jason Derulo and Jordin Sparks Are Dating

The two were spotted arriving and leaving Jason's 22nd birthday dinner together last night at Phillipe Chow in Hollywood, where they were very smiley while posing together for photos.

Sources tell TooFab.com Derulo and Sparks are definitely an item — and while they haven't gone completely public with the relationship news yet, this is the first time we've seen them out as a couple.

Jason was previously linked to his "It Girl" music video co-star Tika Sumpter (Raina) — who has just been cast opposite Jordin in the upcoming "Sparkle" remake!

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