Free Once In A Lifetime ringtone for your phone. Listen first, then download the version you like. Artist: Pegasus. 4 versions are available, from 22 to 93 seconds. If you like r&b and pop ringtones, see the tags below. For iPhone or iPad download the .M4R file. For Android and other phones download the .MP3 file. All ringtones by Pegasus are collected on the artist page.