Shameless cross-promo.
Brtiney Spears on Sabrina, The Teenage Witch (1999)
Only in 1999 would this happen. Britney played herself in an episode of Sabrina, The Teenage Witch. Shortly after, Melissa Joan Hart made a cameo in her video for "(You Drive Me) Crazy," which was also featured on the soundtrack of Melissa's 1999 rom-com Drive Me Crazy.
Destiny's Child on Smart Guy (1998)
Beyoncè, Kelly, and original Destiny's Child members LaTavia Roberson and
LeToya Luckett played themselves in an episode on The WB sitcom. They sang "Amazing Grace" a capella at a school dance and made a video for "No No No" (Part 1)."
Christina Aguilera on Beverly Hills, 90210 (1999)
During her cameo, Christina belted the hits “Genie In A Bottle” and “I Turn To You” while the crowd got their groove on at the Peach Pit After Dark. She was performing for character David Silver's birthday.
Rihanna on Las Vegas (2005)
The now-cancelled NBC series featured RiRi singing her debut single "Pon de Replay." She's really only there to sing that song, do some dancing, and dip.
