Bubbling Under: Alli Simpson Serves Up Debut 'Single'

Each Friday, Billboard presents "Bubbling Under," a weekly look at new and noteworthy acts making their way toward Billboard chart success. Up this week: Alli Simpson, Savoir Adore, JoiStaRR and Love & the Outcome

15-year-old Alli Simpson is following in the footsteps of her older brother, pop singer/songwriter Cody Simpson. The former's debut track "Why I'm Single" (So Alli) hit retail on June 11 and sold 9,000 downloads in its first week, according to Nielsen SoundScan. Its video is off to a fast start, too. After premiering on June 10, it earned 1 million views in its first nine days, pushing Simpson's total YouTube channel views past 10 million.

In the vein of acts that sport male/female vocal interplay (a la Of Monsters and Men and Stars) comes Brooklyn's Savoir Adore, a mix of ethereal pop/rock from Paul Hammer and Deidre Muro. The pair released its second full-length, Our Nature, last year and, newly signed to Nettwerk, have rereleased the set, with the single "Dreamers" having racked nearly 850,000 YouTube views since it posting a year ago. Among the song's early supporters are adult alternative WFUV New York and alternative KITS San Francisco.

Los Angeles native JoiStaRR nears her first Billboard chart appearance as "Seven Sevens" (My Block/eOne) gains momentum below Adult R&B. Before embarking on her solo career, she was personally invited by Kanye West to sing backup on his Glow in the Dark tour and remained on tour with the rapper for five years. The singer/songwriter has penned songs alongside Chris Brown, Brandy and fellow My Block act Mary Mary.

Canadian husband-and-wife duo Love & the Outcome achieve a new peak (No. 22) on the Nielsen BDS-fueled Christian Songs chart and open at No. 27 on Christian AC Songs with their debut single "He Is With Us." The act consists of singer Jodi King and her husband, bass player Chris Rademaker. They were previously based in Winnipeg, Manitoba; now based in Nashville, they've signed to Warner-Curb's Word imprint. The couple's debut album is expected later this year.

Reporting by Keith Caulfield, Wade Jessen, Rauly Ramirez and Gary Trust of the Billboard charts department.