Los Angeles, California - Meghan Trainor has given birth to her second child, according to the pop star's Instagram.

"On July 1st (our 7 year anniversary of our first date) we welcomed Barry Bruce Trainor into the world," the 29-year-old wrote in the IG post.

Several snaps show the All About That Bass performer in the hospital holding her baby boy.

"He was a big boy at 8lbs 7oz...and sideways (transverse), but we had an amazing, successful c-section, and I finally got my skin to skin time!" Trainor said, giving thanks to the doctors and nurses who helped with the delivery.

Celebrities Newly uncovered documents reveal legal woes behind The Beatles' split

The musician first announced her pregnancy in January, when she told People, "I'm just so grateful I can get pregnant. And I'm like, 'I'm crushing it. This is amazing. This is my dreams.' I'm halfway there – I want four kids!"

Little Barry Bruce is Trainor's second child with her husband, actor Daryl Sabara (31). They also share a two-year-old son named Riley.

Fans and friends were quick to congratulate the couple on their happy news. Paris Hilton (42) wrote, "Congratulations sis! So happy for you!" while actor Mandy Moore (39) added, "Go Mama!! And welcome to the party, Barry!! What a lucky dude!!"