Kelly Rowland stepped out with her 3-month-old son Titan in Los Angeles on Monday, and we can't get over how fit she looks -- and how adorable her little boy is!

Kelly, who turns 34 tomorrow, wasn't wearing any makeup, and as far as her amazing post-baby bod, she's been busting her booty with a hardcore workout regime. Last month Kelly and celebrity trainer Jeanette Jenkins launched the "Six-Week Get Your Body Back Challenge," and it's a combination of exercise and healthy eating.

In addition to drinking lots of water, green tea and consuming plenty of veggies and fruits, Rowland switches off with five fitness DVDs, including sexy abs and cardio sculpt, bikini bootcamp and power yoga. Jenkins planned the six-day a week workout schedule with Sunday as a rest day. No wonder Kelly is looking so fab!