1 / 10

'Family' From the Dreamgirls soundtrack - Because, after all, they are tethered to each other for life. (Photo: Dreamworks)

Photo By Photo: Dreamworks

2 / 10

'Ain't No Stoppin' Us Now' by McFadden and Whitehead - When they are on the same page, everyone better move! (Photo: Michael Ochs Archives/Getty Images)

3 / 10

'Best Friend' by Brandy - When it's all said and done, they have more love for each other than you can imagine. (Photo: Atlantic Records)

4 / 10

'Hate That I Love You' by Ne-Yo Featuring Rihanna - For those days when they're just a bit angry at each other. No love lost.  (Photo: Island Def Jam Music Group)

Photo By Photo: Island Def Jam Music Group

5 / 10

'I'll Always Love My Momma' by The Intruders - You can't help but love Frankie. (Photo: Scott Mitchell/Zuma Press/Corbis)

6 / 10

'Isn't She Lovely?' by Stevie Wonder - Awww. Every mother/daughter relationship has its happy moments.  (Photo: Kevork Djansezian/Getty Images)

7 / 10

'Thin Line Between Love and Hate' by The Persuaders - Sometimes it's a bit rocky, but whose relationship isn't? (Photo: Atco Records)

8 / 10

'What About Your Friends?' by TLC - Their love is tested on a daily basis. (Photo: LaFace Records)

9 / 10

'Let's Get Ratchet' by Hurricane Chris Featuring Lil' Boosie - Sometimes the occasion calls for it! (Photos from Left: Ken McCoy/WENN, Kathleen Flynn, Nola.com / The Times-Picayune/Landov)

10 / 10

'B***h Betta Have My Money' by Rihanna - When it comes to coins, neither one of them has time to play around. (Photo: Kevin Winter/Getty Images for iHeartMedia)