In what hotel venue did Irina Antonenko compete for Miss Universe in 2010?
Irina Antonenko:  She also placed in the Top 15 at the Miss Universe 2010 pageant held on August 23, 2010 in Las Vegas. Miss Universe 2010: Miss Universe 2010, the 59th Miss Universe pageant, was held on 23 August 2010 at Mandalay Bay Events Center in Las Vegas, Nevada, USA.
Mandalay Bay Events Center