Bruno Mars' showed off his killer voice last night at the Mirage's 1 OAK Nightclub in Las Vegas.

The "Grenade" singer took part in the premiere of the club's One of a Kind Tuesdays, where he treated the crowd to a 30-minute live performance with him and his 9-piece band.

OK! GALLERY: BRUNO MARS, ALICIA KEYS& FOSTER THE PEOPLE HIT THE 2012 GRAMMY AWARDS RED CARPET

Showing off his classic style, Bruno spent the night in his black blazer and newsboy cap.

Patti Stanger of Bravo's Millionaire Matchmaker was part of the packed crowd who enjoyed a special set of cover songs by Bruno including LMFAO’s “Sexy and I Know It,” Bobby Brown’s “My Prerogative” and Musical Youth’s “Pass the Dutchie.” He ended the show with his hit song "Just The Way You Are."

OK! GALLERY: BACKSTAGE PHOTOS FROM THE 2012 GRAMMY AWARDS: LADY GAGA, BRUNO MARS AND MORE!

Do you have a favorite Bruno Mars song?

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