Credit: Dimitrios Kambouris/WireImage for Compound Foundation

Ne-Yo is one proud papa!

On Monday, the R&B superstar and girlfriend Monyetta Shaw welcomed their second child. On Friday the "Closer" singer (real name: Shaffer Chimere Smith) announced his second child's name -- Mason Evan Smith -- on Twitter.

"If you are truly fam, you'll help me welcome the heir to my throne," Ne-Yo tweeted. "Born Oct. 9, 6 pounds, 10 oz!"

The 31-year-old first became a dad in November 2010, when Shaw -- who co-owns Emerlyn & Ester, a new boutique in Atlanta's Buckhead district -- gave birth to daughter Madilyn Grace.

"Feels like I'm in luv for the first time," he Tweeted after Madilyn was born. "Welcoming that lil' girl to the world last night defined for me what 'willing to kill and die for' truly means. My world, my life, all hers."