AT&T and iHeartMedia plan to add additional features to the app later this year, including custom stations created from a library of more than 20 million songs and 800,000 artists, song lyrics, artist biographies, stations "Perfect For" any mood or activity and thousands of podcasts. "Personalization is one of the key features of AT&T U-verse TV, so a highly-customizable app like iHeartRadio is a natural fit," said GW Shaw, vice president of U-verse and Video Products, AT&T.