All Strung Out - Nino Tempo & April Stevens (recently discovered this mid-chart hit from 1966 on YouTube... LOVE it!!!)
House Of Love - Amy Grant & Vince Gill
What Kind Of Fool - Barbra Streisand & Barry Gibb
I Can't Help It - Andy Gibb & Olivia Newton-John
The Best Of Me - David Foster & Olivia Newton-John
Beauty And The Beast - Celine Dion & Peabo Bryson
A Whole New World (Aladdin's Theme) - Peabo Bryson & Regina Belle
Don't You Wanna Stay - Jason Aldean & Kelly Clarkson
Up Where We Belong - Joe Cocker & Jennifer Warnes
The Last Time I Made Love - Joyce Kennedy & Jeffrey Osborne
When I Said I Do - Clint Black & Lisa Hartman
I'm Your Angel - R. Kelly & Celine Dion
Meet Me In Montana - Marie Osmond & Dan Seals
When I Fall In Love - Celine Dion & Clive Griffin
When I Fall In Love - Natalie & Nat "King" Cole
How Many Times Can We Say Goodbye - Dionne Warwick & Luther Vandross
Whenever I Call You Friend - Kenny Loggins & (uncredited) Stevie Nicks
How Are Ya Fixed For Love? - Frank Sinatra & Keely Smith
Somethin' Stupid - Nancy & Frank Sinatra
Hate That I Love You - Rihanna & Ne-Yo
Almost Paradise - Mike Reno & Ann Wilson
Love Power - Dionne Warwick & Jeffrey Osborne
Can't We Try - Dan Hill & Vonda Shepard
Anything by Donny & Marie Osmond, or anything from any "duets" album (Sinatra, Bennett, etc.)
BTW - "Baby Come To Me" was sung by Patti Austin, not Anita Baker.