United Kingdom, March 7 -- Meghan Trainor is "obsessed" with her recent boob job.

The 31-year-old singer - who has sons Riley, three, and Barry, 20 months, with husband Daryl Sabara - recently went under the knife and is delighted her new implants have left her breasts looking like "twin sisters" rather than "distant cousins".

Showing off the results of her surgery, the 'All About That Bass' hitmaker said in a video shared to Instagram: "I have big news to share. I got my boobs done!

"As you know, I'm in a super busy chapter of my life. I've been touring, working and mommying really hard. So recently, I've decided to do something just for me.

"After having two kids, living a healthier lifestyle and losing weight, I couldn't be happier...