"Ex-Factor" is the second single from American recording artist Lauryn Hill from her debut solo album, The Miseducation of Lauryn Hill (1998). The song incorporates elements of R&B, neo soul and hip hop soul. Released by Ruffhouse and Columbia Records, the song features a sample of "Can It Be All So Simple" by the Wu-Tang Clan.

The song also raised some controversy surrounding claims that it was about former bandmate Wyclef Jean of The Fugees.

"Ex-Factor" was written and produced by Lauryn Hill and it features replayed elements of "Can It Be All So Simple" performed by Wu-Tang Clan.

Monster covered the song on Gone Gone Gone/A Bash Dem" in 1999.

Holly Miranda covered the song on her EP Choose to See, which was included with the purchase of her 2010 album The Magician's Private Library.

In 2006, Canadian singer Stacie Orrico sang a portion of the song in Korean channel KBS 2TV, naming the song as one of her favorite of all time.

In 2009, British R&B and soul singer Nate James covered the song on his album Revivals.

In 2012, American recording artist Beyoncé covered the song during her Revel Presents: Beyoncé Live residency at Revel Atlantic City. She again performed the song on her and Jay Z's On the Run Tour.