Here's a few, I don't think have been used yet, but if they have, that's okay.
"I Honestly Love You" 
by Olivia Newton John,
"Love Will Keep Us Together" 
by The Captain and Tennille
"Endless Love" 
by several singers, can't think of just one.
"Love Makes The World Go Round"
"Love Me Do" 
The Beatles,
"I'll Never Love This Way Again" 
by Dionne Warwick
"Best Of My Love" 
by The Eagles,
"If You Can't Be With The One You Love, Love The One You're With" 
by ???
"And I Love Her" 
by The Beatles,
"Where Did Our Love Go" 
by The Supremes
"I Will Always Love You" 
by Whitney Houston,
"What's Love Got To Do With It 
by Tina Turner