MGM Resorts confirms Lady Gaga's completed December 28, 2018 Enigma debut at Park Theater inside Park MGM, and ABC independently documents her performing there. This verifies an event, not a stay.
Lady Gaga opened her Enigma Las Vegas residency at Park Theater inside Park MGM on December 28, 2018. MGM Resorts announced the exact artist, venue, resort and opening date, then issued a post-event account saying the performance debuted during Park MGM's grand-opening weekend. ABC independently documented Gaga performing at Park MGM that night.
Source conclusion:
The cited sources confirm attendance at an event at the hotel, but not an overnight stay.
