Justin Bieber Songs and Video: Thinkin’ Bout You ft. Justin Bieber – Austyn. So I made this A WHILE back. I changed to pitch to basically chipmunk style because I was bored and wanted to know what it sounded like. lol I decided to upload this version because I wasn’t fully done with the normal version (the one that’s not high pitched lol) and didn’t want to upload that version until I felt it was perfect. And I know I’m really slow and the song is kinda old now, but please be patient. So until then, I hope you get a kick out of this version 
Also, Justin Bieber had nothing to do with this version.
Source:
http://bieberjustin.tv/justin-bieber-songs/justin-bieber-songs-and-video-2