- Mother is Puerto Rican; father is from Ecuador.
- Wanted to become an obstetrician when she grew up.
- While performing with her church choir at Madison Square Garden, Ricky Martin asked for some singers to join him onstage at his concert that night; Bailon was one of the chosen singers.
- Was interning at Beth Israel Hospital as part of a high school assignment when a producer that was a patient there asked if she wanted to join a girl group, which turned out to be 3LW.
- Released her first single with 3LW "No More (Baby I'ma Do Right)" in 2000.
- Joined The Cheetah Girls, a girl group put together by the Disney Channel, in 2003; they were featured in several Disney TV movies and released several albums before breaking up in 2009.
- Claudette Bailon — Sister
- Lenny Santiago — Ex-fiancé
- Israel Houghton — Husband
- Rob Kardashian — Ex-significant Other
- Nila Felix — Mother
- Freddie Bailon — Father