Levine, who is a judge on NBC's talent show "The Voice," and Victoria's Secret model Anne Vyalitsyna separated in an "amicable" manner, according to the report.
"Adam and I have decided to separate in an amicable and supportive manner. We still love and respect each other as friends. I wish him all the best," 26-year-old Vyalitsyna, also known as Anne V, said in a statement.
Vyalitsyna, who has appeared in eight consecutive Sports Illustrated swimsuit issues, met Levine, 33, at a 2010 party for the magazine in Las Vegas, where Maroon 5 played.
The couple walked the runway with each other at the 2011 Victoria's Secret show and even posed naked together for the cover of Russian Vogue.
But their relationship hit a rocky patch when they "got into a big fight in late January" and nearly split, a source told Us Weekly magazine.