New York, Nov 5 Madonna is leaving no stone unturned to promote toy boy lover Jesus Luz's career.

The pop queen showed up to catch the tail end of her boyfriend's DJ gig at the DVD release party of Matt Tyrnauer's 'Valentino: The Last Emperor' on the 18th floor of the Standard Hotel.

"She was grinding with a bunch of hot fashion guys while Luz spun," The New York Post quoted a source as saying.

"She's been taking a more active role in promoting him, so she stuck around for a bit and mingled before they left together (right)," said the insider.

Madonna has already given her Brazilian beau's modelling career a push by helping him land a juicy contract with Dolce and Gabbana.

However, her rep insists she's "not at all involved in managing the career of Jesus Luz." (ANI)