October 13, 2011 05:00 PM

Gregory Pace/BEImages

Less than a year after the birth of daughter Madilyn Grace, Ne-Yo is a father again.

The singer-songwriter and Monyetta Shaw welcomed a son, Mason Evan, on Sunday, Oct. 9, his rep confirms to PEOPLE.

“Sal-u twit fam. If you are truly fam you’ll help me welcome the heir to my throne,” the proud papa Tweeted regarding the birth of his 6 lbs., 10 oz. baby boy.

“[Fatherhood] has been a ride, but I’m loving every minute of it,” Ne-Yo, 31, told PEOPLE in September.

His newest record, The Cracks in Mr. Perfect, is due out in 2012.

— Carlos Greer

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