It was just announced that Ringo's in charge of the new song promoting Shieseido's MA CHERIE haircare products. The song is also titled "MA CHERIE".
The commercial will feature actress Nana Komatsu, who you might remember from the Jiyuu e Michizure video or The World of Kanako.
The announcement doesn't say much more right now, and there's no preview of the song yet. No mention of whether Ringo is just composing the tune or singing it too.
More information will come in the future, obviously.
http://www.shiseido.co.jp/macherie/
Edit: Here's the 15 and 30 second commercials. French Ringo.
Here's the lyrics, taken from the site:
