Ashley Roberts likes flattering underwear.

The 31-year-old star's toned body might be the envy of every girl, but the former Pussycat Doll singer credits good underwear for her flawless figure.

Speaking to Look magazine, Ashley said: ''Good underwear won't let you down and I always go for seamless undies.

''I hate it when you get pants that really dig in, it just creates extra lines and bulk that makes you look bigger.''

The 'Dancing On Ice' judge is an exercise junkie and insists she really enjoys working up a sweat because it gives her a fell-good rush of endorphins.

''I work out a lot, but I really enjoy it. Ever since I was a little girl I've always been active, so it's just in me to keep healthy and I love the endorphin rush it gives.

''I love yoga for stretching and keeping my body soul aligned. I work out four times a week.