07/20/2009 at 12:00 PM EDT
Christina Milian, who for months has been keeping her engagement to Grammy-nominated producer The-Dream under wraps, is officially "engaged," a pal confirms after the R&B singer hosted a Hollywood Hills birthday bash for music producer Billy Clark Saturday at the Venom Energy and Trainwreck Clothing event.
Milian sported her huge engagement ring while friends stopped by to say hello upon their arrival.
Milian and The-Dream (real name: Terius Hagert Youngdell Nash), both 27, were attached at the hip and even wore matching outfits – she, a short-sleeved red dress; he, in jeans, a wife beater and an open red button-down shirt.
Later on, the pair took a load off their feet and appeared very affectionate, with Christina resting her head on his shoulder.
Reps for Milian were unavailable for comment.
– Jennifer Garcia