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"The diva is back! Though she didn&amp;apos;t mentor any contestants during the fourth season of The Voice, Christina Aguilera made a grand return for the NBC hit&amp;apos;s June 18 finale. Showing off her estimated 20-pound weight loss in a black pencil skirt, a sheer metallic top and a hot pink bra, the four-time Grammy winner performed her No. 1 hit &amp;quot;Feel This Moment&amp;quot; with Pitbull.\r\n&amp;quot;How cool was that seeing Christina tonight?&amp;quot; Blake Shelton asked reporters backstage. &amp;quot;She looks amazing, by the way.&amp;quot; Aguilera and Cee Lo Green will join Shelton and Adam Levine for Season 5 after Shakira and Usher stepped in for Season 4.\r\n\r\n&amp;quot;Cee Lo and Christina are the two that Adam and I started this thing with and there&amp;apos;s a camaraderie there that helped create this thing,&amp;quot; said Shelton, who celebrated his 37th birthday that night. &amp;quot;It will be right back where it was before. You know, there&amp;apos;s a friendship there -- I still talk to them both all the time, and I&amp;apos;m sure Adam does, too.&amp;quot;\r\n\r\nIn her off season, Aguilera, 32, has been working hard to get her body back in shape. In early May, with a slew of appearances lined up for her new single, the pop star made a drastic change: She recommitted herself to exercise by reteaming with fitness pro Tee Sorge, who helped her shimmy down for 2010&amp;apos;s Burlesque.\r\n\r\nIn addition to weight training with Sorge, the mom to Max, 5 (with ex-husband Jordan Bratman) has been practicing yoga regularly. &amp;quot;It&amp;apos;s more of a mind-body thing for her,&amp;quot; a source revealed in the June 10 issue of Us Weekly. &amp;quot;She believes in exercise that she enjoys, doing strength work as opposed to intense cardio.&amp;quot;\r\n\r\nThe multiplatinum pop star is embracing her slimmer shape, according to stylist Simone Harouche. &amp;quot;She&amp;apos;s really into dresses that highlight her decolletage and her waist,&amp;quot; she told Us. &amp;quot;She&amp;apos;s showing off her amazing figure.&amp;quot;"^^<http://www.w3.org/2001/XMLSchema#string>
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