How Kelly Rowland Lost 70 Pounds in Just 4 Months

— -- Wait, what!? Kelly Rowland dropped 70 pounds of baby weight in just four months.

The former Destiny's Child singer, 34, spoke to Extra about having a baby, Titan, with her husband, Tim Witherspoon, in November.

Apparently, spin class is the key to dropping all the weight.

“Jeanette Jenkins is the secret, SoulCycle is the secret," she told the show. "When I go in there and it’s the wee hours of the morning, she is a great secret -- so motivational. Jeanette comes in with so much energy and this huge smile on her face, and you can’t help but to get excited about working out.”

Rowland also went back to the basics -- eating healthy.

“The 80/20 rule is all the way real, 80 percent of the time you eat those foods giving you nourishment, you’re eating clean, and 20 percent of the time, have guacamole, a ton of it like I do, and a margarita and maybe queso too!” she said.