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"L.A.&amp;apos;s Staples Center was the place to be on Monday, July 1, when Beyonce took the stage for the third show on the U.S. leg of her Pepsi-sponsored Mrs. Carter World Tour. Celebs packed the house to watch Jay-Z&amp;apos;s wife work the sold-out crowd of tens of thousands of fans, giving the already super-powered event an extra dash of Hollywood glitz and glamour.\r\n\r\nAs Us Weekly previously reported, recently single Robert Pattinson was in attendance at the show, wearing a backwards baseball cap, jeans, boots, and a vintage MTV varsity jacket. But he wasn&amp;apos;t the only A-lister in the arena -- far from it, in fact.\r\nGlee&amp;apos;s Kevin McHale was also in the crowd, along with pregnant costar Heather Morris, who was a backup dancer for Beyonce before she landed the role of Brittany on the FOX series. (Morris performed the iconic &amp;quot;Single Ladies&amp;quot; dance alongside Chris Colfer&amp;apos;s character in one of the very first episodes of season one.)\r\n\r\n\r\n&amp;quot;Heather looks super pregnant -- she was wearing a long, tight dress and holding her belly,&amp;quot; an onlooker told Us of the mom-to-be. &amp;quot;She looked really happy though!&amp;quot;\r\nDell&amp;apos;s VIP area in the HYDE Lounge, meanwhile, played host to Morris&amp;apos;  costars Lea Michele, Chris Colfer, and Naya Rivera, who brought boyfriend Big Sean. A source tells Us Weekly that Rivera and Big Sean were kissing and dancing throughout the night, to tunes including &amp;quot;Run the World,&amp;quot; &amp;quot;Halo,&amp;quot; and &amp;quot;Single Ladies.&amp;quot;\r\n\r\nElsewhere in the Dell-hosted section, Captain America star Chris Evans cozied up to girlfriend Minka Kelly, while Karina Smirnoff and Tiffani Thiessen played dress-up in the Dell photo booth. Toward the end of the night, Smirnoff&amp;apos;s Dancing With the Stars pal Derek Hough challenged another guest to a dance-off.\r\n\r\nOther celebs in the audience included Kourtney Kardashian, who stood front-row with sister Kendall Jenner and documented her amazing view of the stage on Instagram. Australian pop star Kylie Minogue also snapped a pic of Beyonce, which she captioned: &amp;quot;The Queen had her #beyhive buzzing...Flawless show. #Flawless!&amp;quot;"^^<http://www.w3.org/2001/XMLSchema#string>
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