Pop Diva Collaborations Ranked From Best to Worst

(NBC | VEVO)Lady Gaga caught one of Britney Spears' performances in Las Vegas over the weekend (and chowed down on Britney's dad's barbecue!), so naturally there are whispers that the pair will team up in the recording studio sometime soon for some pop diva duet magic. 

Both Gaga and Britney have played this card before, as have most other chart-topping females. When divas join forces, they're guaranteed hype — but sometimes the execution doesn't quite live up to expectations. Not all diva duets are equal! Here's our ranking of the most recent big deal diva duets and collaborations from best to worst.

1. "Lady Marmalade," Christina Aguilera, Pink, Mya, and Lil Kim
This brilliant Missy Elliott production was a very big deal when it was released back in 2001, and no wonder — it has all the elements of a blockbuster, including backstage drama between Christina Aguilera and Pink. The music video was almost as epic as the vocals, with Christina bringing the Dee Snider realness with that hair and makeup. It also prompted one of Pink's best acceptance speech lines at the MTV VMAs that year: "Thank you to everybody who thought we'd make good whores!"

2. "The Boy Is Mine," Brandy and Monica
Brandy and Monica capitalized on completely untrue rumors of a rivalry with this clever R&B duet, which practically ruled the radio in the summer of 1998. The song, which was inspired by an episode of The Jerry Springer Show, won the Grammy award for Best R&B Performance by a Duo or Group with Vocals. It was also the best-selling single of the year.

3. "When You Believe," Whitney Houston and Mariah Carey
No one did big ballads better than Whitney or Mariah in the '90s, so of course it was completely magical when they teamed up to record an inspirational duet for The Prince of Egypt in 1998. The Stephen Schwartz-penned tune won the Oscar for Best Original Song in 1999, although the version that won was actually sung by Michelle Pfeiffer and a singer named Sally Dworsky (Houston and Carey still performed at the awards show).

4. "Do What U Want," Lady Gaga feat. Christina Aguilera
Sometimes a little scandal makes for great music. Lady Gaga first recorded this ARTPOP single with R. Kelly, but teamed up with Christina Aguilera to perform it live on the season finale of The Voice in late 2013 (i.e. shortly after public interest in R. Kelly's child pornography trial was revived). Making the collaboration even sweeter: The duet put rumors of a long-standing feud to rest (sound familiar?).

5. "Telephone," Lady Gaga feat. Beyoncé
The only problem with this 2010 track, which Lady Gaga originally wrote for Britney Spears, is the fact that the music video is so good it practically overshadows the song. Even if it goes hard on the product placement (mmm, Miracle Whip). 

6. "Beautiful Liar," Beyonce and Shakira
This 2007 hit was a solid radio hit, but let's be real: The best part of this collaboration was the the super-sexy music video, in which the performers play belly dancing doppelgangers — without any gratuitous butt shots (we'll get to that later).

7. "Me Against the Music," Britney Spears feat. Madonna
The dance-chase in the music video for this 2003 club track is pretty unforgettable, but Madonna's vocal contributions to the song feel like they were tacked on post-production (because that's pretty much what happened). 

8. "Can't Remember to Forget You," Shakira feat. Rihanna
When Shakira's much-hyped duet with Rihanna finally made its Internet debut in early 2014, underwhelmed fans hoped the pair would step it up for the music video. What they got: Copious amounts of butt thrusting and grabbing. Whee.

9. "Bangers (SMS)," Miley Cyrus feat. Britney Spears
Miley sounds like she's just guzzled a pack of Four Lokos on this dizzying effort, and Britney barely sings (her part is kind of like a bratty, sexy spoken word poem). Minus points for stealing a line from Fantasy Island's Tattoo.

10. "The Greatest Thing," Cher feat. Lady Gaga
It's really not even fair to include this song on this list, since it's lame enough that neither performer ever wanted it to see the light of day. Gaga later explained, "When we do a duet that we release, I want it to be special. I want us to work on it together."
I'm the former Zimbio Music Editor. Into music, cats, karaoke, and shiny things. Follow me: Google