Adam Levine “crossed the line” with his flirtatious behaviour – but has denied cheating on his wife. The 43-year-old pop star has rubbished claims made by Instagram model Sumner Stroh that he cheated on Behati Prinsloo – although he’s confessed to showing “poor judgement”. In a statement on Instagram, Adam – who has been married to the model since 2014 – said: “A lot is being said about me right now and I want to clear the air. “I used poor judgment in speaking with anyone other than my wife in ANY kind of flirtatious manner. I did not have an affair, nevertheless, I crossed the line during a …