Shania Twain will be conducting a Wednesday afternoon (June 8) press conference in Nashville to make what her management company has described as a "big announcement." No other details have yet been revealed. The 2 p.m. CT event will be streamed live on her official website -- http://www.shaniatwain.com/. A link to the stream will also be available at CMT.com. The announcement will be made just hours before Twain appears as a presenter at the 2011 CMT Music Awards airing Wednesday at 8 p.m. ET/PT on CMT and CMT.com. The awards show will feature an opening segment featuring Twain and Taylor Swift as the main characters in a parody of the film Thelma & Louise. Twain will also sign copies of her autobiography, From This Moment On, during the CMA Music Festival taking place later this week in Nashville. Her autograph session takes place Friday from 2-4 p.m. at the Bridgestone Arena.