Maroon 5 front man Adam Levine had been dating Victoria's Secret model Behati Prinsloo but the couple has been off-and-on over the past couple of months. Now that the couple is officially broken up, Levine has already moved on to a younger model. Levine is allegedly dating 21 year-old Sports Illustrated model Nina Agdal. The couple hasn't gone public yet with their romance but last week Agdal was on the set of The Voice. She returned to the set for a live taping a few days later.