AGE 19: Bethany Mota

YouTube star

What makes her powerful: Bethany Mota started creating short videos on her YouTube channel, Macbarbie07, in 2009, and has amassed 7 million subscribers. More than web famous, Mota has a line through clothing retailer Aeropostale, and appeared on the most recent season of "Dancing With the Stars." Mota has invaded the White House. After the most recent State of the Union address, she got to interview President Obama in front of all her fans.

Another powerful 19-year-old: Kendall Jenner has taken the modeling world by storm recently, becoming the new face of Karl Lagerfeld and Estee Lauder.