Britney Spears' wedding ... joining forces for 2003's "Me Against the Music" duet. Later that year, the pair shared an infamous kiss during a performance with Christina Aguilera and Missy Elliott ...

Spears also sang "Stars Are Blind" with Paris Hilton and danced to ... their iconic onstage kiss from the 2003 MTV Video Music Awards — though Christina Aguilera wasn't present to fully recreate ...

Paris Hilton knows how to get a party jumping ... including video of her and a friend dancing on a table to her best friend, Britney Spears' song, "Work Bitch." Snoop Dog led everyone in singing ...

The use of autotune on a Spears track, some critics argued, positioned the singer as being less gifted and less authentic than Aguilera. In this equation, Christina was better; Britney ...