‘American Idol’ winner Jordin Sparks and singer Jason Derulo had their official coming-out as a couple on Sunday night when they attended Derulo’s belated 22nd birthday party together in Hollywood.

PEOPLE reports that Sparks “would sing to him occasionally through the night in his ear if her head was nested on his shoulder.” The source also says Derulo, who’s been touring in Europe, was “excited to spend some [quality time] with Jordin in LA … The two left together and continued the celebration.”

Suspicions about the couple grew while Derulo was abroad. On September 21, Sparks tweeted: “@jasonderulo Will you get back to the states already??” and later wrote: “Happy Birthday, @jasonderulo!! 22 is the best number EVER!”

His reply? “thx LOVE.”

Derulo’s new album, ‘Future History,’ was released on Tuesday. Check it out.

[PopCrush]