EDITED : Seems like livejournal is having a very big trouble embedding this videos, please check it yourself x__x
http://www.youtube.com/watch?v=aP08z0UVGRs
miwa and COTTON USA episodes
episode 1 : http://www.youtube.com/watch?v=1RRHYKvpuUg
episode 2 : http://www.youtube.com/watch?v=f2KAPKKr2Ec
Making : http://www.youtube.com/watch?v=N8_893JlOek
And in case you forgot about EXILE+miwa+YMO+other artists project, "JAPAN UNITED with LOVE", here's the short PV I found.
www.youtube.com/watch?v=-Bx_PeXmmRk
source : miwaddicts LJ