ASTRO returns to the Emerging Artists chart this week with big gains on YouTube and Twitter. Following a busy 2019 that included two album releases and their first-ever U.S. tour, ASTRO is looking to reintroduce themselves with a new EP that looks to transcend their past. Following the release of the K-pop boy band’s Gateway — that ties in everything from surging pop on standouts “Knock” and “Lights On” to playful hip-hop for “When You Call My Name” — ASTRO sees gains across the board to mark a return to Billboard‘s Emerging Artists chart. At No. 49 this week, ASTRO’s re-entry to Emerging Artists can be mostly attributed to their social media presence. Upon the release of Gateway, the sextet gained 75,000 new YouTu...