In 1926, with the arrival of "talkies" many musical short films were produced. Vitaphone shorts (produced by Warner Bros.) featured many bands, vocalists, and dancers. Animation artist Max Fleischer introduced a series of sing-along short cartoons called "Screen Songs", which invited audiences to sing along to popular songs by "following the bouncing ball," which is similar to a modern karaoke machine. Early 1930s cartoons featured popular musicians performing their hit songs on-camera in live-action segments during the cartoons. The early animated films by Walt Disney, such as the "Silly Symphonies" shorts and especially "Fantasia", which featured several interpretations of classical pieces, were built around music. The Warner Bros. cartoons, even today billed as "Looney Tunes" and "Merrie Melodies", were initially fashioned around specific songs from upcoming Warner Bros. musical films. Live-action musical shorts, featuring such popular artists as Cab Calloway, were also distributed to theaters.