\"I Think You Might Like It,\" a U.S. music video from \"Grease\" co-stars Olivia Newton-John and John Travolta, has been viewed on YouTube more than 475,000 times. The sequel to the pair\'s iconic 1978 duet, \"You\'re the One That I Want,\" was posted online Wednesday. Both songs were penned by John Farrar. The new tune is featured on Travolta and Newton-John\'s album, \"This Christmas,\" the proceeds of which will benefit the Jett Travolta Foundation and the Olivia Newton-John Cancer and Wellness Centre in Australia.