The star wrote: “Who gives birth then five weeks later attempts to puts on this tight little red number? I do! But only for America’s Got Talent.
“After filming it’s straight into comfy clothes.”
She posed in a red mini dress, which was made from a shiny PVC material.
It was an off the shoulder number with a cape detail.
She wore a bright red lip to complement the dress, with dangling gold earrings.
In March, Alesha showed off performing a workout using her at the time seven month old daughter Anaya as a weight.
She filmed herself doing a number of sits, up and lifting Anaya up for a kiss.