Luke was doing some live karaoke with the band, and needed some help with the song lyrics.
He asked for someone in the crowd's phone so he could look up the lyrics, and a woman in the front offered her's up.
As Luke was singing the song and reading the lyrics on the phone, a text message came thru from a guy..... from here on it is hilarious.
Luke reads the message to the crowd, and then answers the guy for her! He teases that he is going to go thru her pictures on her phone too, but is only kidding!