Home Slickdeals Thats You, Knowledge is Power, Singstar Celebration 99 cents or less at... Slickdeals Thats You, Knowledge is Power, Singstar Celebration 99 cents or less at Gamestop. PS4 Party games $0.99 By ARCOM - 27 November 2018 111 0 SHARE Facebook Twitter Go to the deal page: Thats You, Knowledge is Power, Singstar Celebration 99 cents or less at Gamestop. PS4 Party games $0.99