07/20/2011 at 02:00 PM EDT
's marriage may be over
, but that isn't stopping her from helping others celebrate their own weddings.
Following Friday's announcement
that the American Idol
judge, 41, split from her husband of seven years, Marc Anthony, Lopez wasted no time getting back to what she does best. She performed Tuesday night at the wedding of oil tycoon Azam Aslamov's son in Ukraine, the country's local newspaper Segodnya
According to reports, the celebration took place at the Crimean Aivazovskii Hotel on the Black Sea coast. The entire hotel staff – including cleaners and cooks – was sent away for the week of July 17-20, and the location was closed to visitors during this time, except for those with permits.
Lopez danced and sang for $1 million, the paper says. When she came out of her hotel to go to the show, three bulletproof vehicles guarded the exit, to shield her from the view of waiting fans.
The lavish, multimillion-dollar affair attracted several hundred guests, many of whom were flown in by helicopter.
As for Lopez, she reportedly stayed in a penthouse suite of the Villa Helena and brought backup dancers, vocal singers and 20 tons of sound equipment.
For more on what tore the couple apart – and what will happen to their kids and multimillion-dollar homes – pick up this week's issue of PEOPLE, on newsstands Friday