VIDEO : Prince William Speaks with Lady Gaga on Mental Health

Prince William has enlisted Lady Gaga in his campaign to persuade people to be more open about mental health issues. The heir to the British throne released a video Tuesday in which he speaks with the pop star via FaceTime. Lady Gaga, who last year spoke out about her struggles with post-traumatic stress disorder, places the call from her kitchen in California, and William answers at his desk in Kensington Palace. The video offers honest, candid answers about the two's journey with mental health.