Bubbling Under: My Crazy Girlfriend, Propain, Strand of Oaks

Pop Radio Goes 'Crazy'

My Crazy Girlfriend approaches the Mainstream Top 40 chart with "Crazy Stupid Love." The rhythmic/pop song follows the act's breakout, "Go F--k Yourself," which topped Dance Club Songs in February. Signed to Capitol Records, the group once lived in an apartment across the street from the label's famed Hollywood tower, with their sights set (literally) on landing a record deal.

Propain Ignites

Houston rapper Propain turns up the heat on R&B/Hip-Hop Airplay with his ode to the booty call, "2 Rounds" (eOne), which debuts on the chart at No. 50. The steamy, bass-heavy cut features Atlanta rapper Rich Homie Quan. Propain first garnered national attention in 2011 with his "Dangerous Minds" mixtape, which features such H-Town rap A-listers as Bun B, Slim Thug and Chamillionaire.

Oaks Branching Out

Timothy Showalter's one-man band Strand of Oaks is gaining traction below the Triple A chart with "Goshen '97," the first track from his forthcoming debut album for Dead Oceans, "HEAL." The Philadelphia-based songwriter enlisted J. Mascis of Dinosaur Jr. on guitar for the raw rock song, named after Showalter's Indiana hometown.

-Rauly Ramirez, Gary Trust and Emily White