Which Kardashian sister co-hosted The X Factor USA with Mario Lopez in 2012?

Khloé Kardashian co-hosted The X Factor USA with Mario Lopez in 2012.

Kardashian and Lopez presented the second season of the American version of The X Factor. The season premiered in September 2012, with Simon Cowell, Demi Lovato, Britney Spears, and L. A. Reid serving as judges.

The hosting role was Khloé Kardashian’s most prominent network-television presenting job at that point. She and Lopez handled live introductions, contestant transitions, and results-related segments during the competition.

The partnership lasted only one season. Lopez returned as host for the third season, while Kardashian did not. This can cause confusion with the Kardashian family’s many other television appearances, but Khloé is the sibling specifically associated with co-hosting The X Factor USA.