News that likely has Jason Castro cheering Hallelujah: The former American Idol contestant is expecting his first child with wife Mandy Mayhall. The singer announced the news on his blog, writing that the couple will welcome a daughter. “What am I going to do with a sweet little girl?!” he wrote. “Probably just smile a lot … It’s an exciting time, I’m in a happy place. So thankful for the presence of God in my life!” Castro and Mayhall have been married since January 2010.