After scaling Billboard's dance/electronic charts, Swedish duo Galantis crosses to pop radio with "Runaway (U & I)" (Big Beat/RRP). The frenetic track reached No. 8 on Dance/Mix Show Airplay and No. 15 on Hot Dance/Electronic Songs earlier this year. This isn't the pair's first hit: Christian "Bloodshy" Karlsson co-wrote Britney Spears' "Toxic," and Linus Eklow co-penned Icona Pop's "I Love It."