Hot 100 Chart Moves: Echosmith's 'Cool' Climbs, Jason Derulo Hits Top 40 — billboard.com

As previously reported, Meghan Trainor leads an all-female Billboard Hot 100 for a third week with "All About That Bass." Plus, Jeremih's "Don't Tell 'Em," featuring YG, hits the top 10 and Jennifer Lopez debuts at No. 18 with "Booty." Who else shakes their way up the Hot 100 this week? Echosmith: It's been a steady rise for "Cool Kids," up 21-19 on the Hot 100. The sibling band's track was released in summer 2013, but only caught fire in the past few months. The quartet's Jamie Sierota jokingly says the success was "definitely a slow boil, for sure." But his sister, and bandmate, Sydney Sierota adds, "But it's boiling!"

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