The Thinking Out Loud hitmaker has become a regular at romantic occasions in recent weeks - last month (Jul15), he serenaded Little Mix star Jesy Nelson as she accepted a proposal from Rixton singer Jake Roche, and he also played Cupid for Kodaline bassist Jason Boland to propose to his girlfriend onstage during a show at Croke Park in Dublin, Ireland.
Then, on Monday (17Aug15), he celebrated pal Ronan Keating's wedding in Scotland by performing a hits medley dedicated to the groom and his new wife, Australian model Storm Uechtritz.
And now Lovato wants to book Sheeran to sing for her when she exchanges vows.
The Heart Attack hitmaker, who is dating actor Wilmer Valderrama, tells the BBC, "I already told Christina Perri that she's playing at my wedding so probably her and I really want Ed Sheeran... and the list could go on and on."
Now, she's just waiting for her boyfriend to propose, adding, "I'm just a little old-fashioned when it comes to that. You know I let him call the shots, I make a lot of decisions in my life so it's nice to kind of hand over the control to someone else.''