Beyoncé is no stranger to celebrity endorsement, but her latest unexpected marketing trick goes outside the box.

Beyoncé is no stranger to celebrity endorsement, but her latest unexpected marketing trick goes outside the box. This weekend, the powerhouse artist teased a new 50 Shades of Grey trailer by posting a 15-second clip of it on her Instagram with a “darker remix” of her “Crazy in Love” playing as a soundtrack. The teaser was posted with the hashtag #fiftyshades, attracting the attention of both the singer’s fans and the book series’ avid fandom. (MTV)