While a new album, opening for Metallica and playing headline shows were all big deals for Wolfgang Van Halen and his Mammoth WVH band this year, he was happy to be involved in another major project. Van Halen played rhythm guitar on "I'm Just Ken," a Grammy Award-nominated song from the hit film "Barbie" sung by co-star Ryan Gosling. The track, which appeared on the Billboard Hot 100 and the Hot Rock & Alternative Songs chart, is being re-released Wednesday, Dec. 20, in a new "I'm Just Ken (Merry Kristmas Barbie)" version, and Van Halen tells us...