George Lopez Challenges Usher To NBA Playoffs Bet Dan Koelsch, April 13, 2010April 13, 2010 Sure, the biggest news lately regarding George Lopez is how his TBS show, Lopez Tonight, will be following Conan O’Brien later this year (and couldn’t be happier), but Lopez has been trying other ways to gain attention recently as well. The comedian recently challenged R&B singer Usher to a competition…