39. Keke Palmer
Most Memorable Role: True Jackson on True Jackson, VP
While Keke Palmer already garnered buzz starring in Akeelah and the Bee, her career went into overdrive playing the title role in Nickelodeon's True Jackson, VP, a teen who lands a job heading the kids' division of a fashion company. Now that she's 19 years old and grown, Palmer's set to play Chili in VH1's upcoming TLC biopic.