Blake Shelton started up a friendly feud with Luke Bryan on Twitter — but it's hard to say who will win this round. On Monday, Shelton tweeted a fake news story about drivers falling asleep at the wheel when listening to Bryan's music. «Wow! Just catching up on the news… Shocking! I have noticed some fatigue when @lukebryanonline comes on,» he wrote.The judge retaliated by referencing Shelton's newest songs, «Happy Together» and «Nobody But You,» with girlfriend Gwen Stefani.