Julianne Hough

Gabrielle Union addresses fans with thank you note on Twitter after sudden exit from America's Got Talent

Gabrielle Union's tweet came a few days after blog Love B Scott reported that she had allegedly opened up about some "problematic" situations on the show's set before her departure

Watch: India's Bir Khalsa group surprise America's Got Talent judges with their daredevil performance

The stunt was performed by Bir Khalsa's Kawaljit Singh, who is said to be world’s tallest policeman and his partner Jagdeep Singh.

Grease prequel Summer Nights in the works, will explore John Travolta, Olivia Newton-John's first meeting

Grease's prequel Summer Nights will be written by John August.