Beyonce Knowles

With stunning looks, a glamorous style and pop-star status, it was inevitable that this diva would eventually try her hand at acting. And while she's fared better than Mariah Carey, it remains to be seen whether Knowles can actually act or just act sassy. After topping the charts as part of the award-winning R&B trio Destiny's Child, she struck out on her own and scored a string of solo hits, often collaborating with rapper boyfriend Jay-Z. She made her acting debut on the small screen in Carmen: A Hip Hopera and quickly moved on to features with spirited turns in the comedies Austin Powers in Goldmember and The Pink Panther. But the diamond in her tiara was winning the lead in the highly anticipated film adaptation of the musical Dreamgirls, which earned her a Golden Globe nod.