When the U.K. press began dubbing Adele "the next Amy Winehouse" in late 2007, the hype didn't touch upon the heavy singer/songwriter influence found in the Londoner's music. Influenced by Roberta Flack and Suzanne Vega as much as Jill Scott, Adele soon became a phenomenon in her own right; her second album 21 eventually sold an estimated 30 million copies worldwide, making her one of the few sales successes in an age of digital streaming.