Jessica Simpson's children have shown her the meaning of life.

The singer shared two adorable snapshots of her kids, 22-month-old daughter Maxwell and nine-month-old son Ace Knute, on Instagram last night (03.04.14) and took the opportunity to express how ''grateful'' she is to have the youngsters in her life.

Alongside a photo of baby Ace in a plaid onesie, she wrote: '' I know what my life is about. I am so grateful.''

Jessica also posted a picture of Maxwell accompanied with the caption, ''Maxi can't wait for RIO2'', referencing the Amazonian rainforest animated sequel.

The proud mother, who has recently shed 50lbs of her baby weight, is engaged to Eric Johnson and is determined to stay in shape for her big day later this year.

She said previously: ''Knowing that I have the wedding coming up is an incentive to stay on Weight Watchers, count my points and stay in the gym. I mean, when you see my dress, you'll know.''

The blonde beauty is said to have changed the location for the ceremony at the last minute, moving the procedures from the Italian island of Capri this summer to somewhere closer to home in Los Angeles.