John Mayer and Taylor SwiftJohn Mayer is known for dating beautiful women -- and clearly doesn't discriminate on their ages. The 32-year-old rocker, who was previously involved with 40-year-old Jennifer Aniston, is now rumored to be dating Taylor Swift, 20.

"Taylor and John are absolutely more than 'just friends,'" a source tells Hollywoodlife.com.

"They aren't 'boyfriend and girlfriend' or anything as provincial as that, but they have taken their friendship to the next level," the source adds.