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Notorious Hollywood playboy Adam Levine may be ready to settle down. His girlfriend showed off a huge sparkler after dinner with her man at Madeo last night.

Now, we're thinking that's probably not real because it's bigger than Simon Cowell's fiancee's rock, but if so, she's one lucky lady!

Adam and his model gf, Anne Vyalitsyna, haven't been dating for too long, but it already seems like it's getting serious. Just the other night the Maroon 5 frontman serenaded his sweetie on her birthday at a New York club!