Who's Going to Guest 星, つ星 on BONES（ボーンズ）-骨は語る- in May? 

Singer Jordin Sparks will appear in a music-themed episode.
キーワード: who's, going, to, guest 星, つ星, on, BONES（ボーンズ）-骨は語る-, in, may, season 5, spoilers