Nick Gruber Is a Changed Man

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NEW YORK - OCTOBER 12: (L to R) Nick Gruber and Calvin Klein attend the Cinema Society & Laura Mercier screening of "Conviction" at Tribeca Grand Hotel on October 12, 2010 in New York City. (Photo by Stephen Lovekin/Getty Images) *** Local Caption *** Nick Gruber;Calvin Klein Photo: Stephen Lovekin/2010 Getty Images/2010 Getty Images

Following his "amazing learning experience" in rehab, Calvin Klein's ex-boyfriend "was spotted at Hyde lounge in Los Angeles, sticking to Red Bull and enjoying a set by DJ Smiles" on Sunday night, the Post reports. DJ Smiles, eh? Did he spin Kumbaya for Gruber, too?