The stars of 2012, online and on air (from left): Nate Ruess of fun., Gotye, Carly Rae Jepsen and Psy. Matt Roberts/Getty Images, Tony Nelson/Corbis Images, Kevin Winter/Getty Images, Kevin Winter/Getty Images hide caption

itoggle caption Matt Roberts/Getty Images, Tony Nelson/Corbis Images, Kevin Winter/Getty Images, Kevin Winter/Getty Images

Carly Rae Jepsen is the 26-year-old singer behind the inescapable pop hit "Call Me Maybe." Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Released in December, Carly Rae Jepsen's "Call Me Maybe" has been rising on the charts — it reaches no. 5 this week — and winning the hearts of fans on YouTube. Vanessa Heins/Courtesy of the artist hide caption

itoggle caption Vanessa Heins/Courtesy of the artist