HELP! I need to identify a french song and artist!!!!

hello everyone! I reeealllly need help in identifying a great song i heard on french radio recently. I think it was sung by a man called Lorenzo, although i think it was a live performance, because it was acoustic. It had lines like, 'elle m'a vue sans desespoir,(I think!!!)
the man also sang, 'elle agir le moins je faire,
me contienneree je l'univaire??????
I know it probably doesn't make sense but please can someone help me!!!!!!!!!! Thanks a lot!