Ariana Grande's fans are convinced that she carries a photo of her boyfriend, Ethan Slater, on her iPhone lock screen wherever she goes.  The singer was spotted at the Paris Olympics watching the women's artistic gymnastics competition with her Wicked costar, Cynthia Erivo.  During a brief interview, fans caught a glimpse of the lock screen photo, which they believed to be of Ariana and Ethan. The pop star's relationship with Ethan was first reported last summer, with sources claiming they began dating while shooting the musical film Wicked.  What is on your lock screen?