But not so fast.
E! News spoke to the Material Girl's publicist, Liz Rosenberg, who told us, "Not true, she is on tour."
As any Madonna fan could tell you, the Queen of Pop is in the middle of the U.S. leg of her MDNA trek and just played—and offended—Denver last night. So for her to hop a jet all the way to the Mediterranean and then hightail it back to the U.S. for tomorrow's show in Dallas seemed pretty far-fetched anyway.
As for John, he would have faced a similar time crunch on the travel front as the music legend performed at Las Vegas' Caesars Palace last night and has another concert scheduled tonight there. So unless he found a teleportation device, it's a good bet he wasn't there either. His rep had no comment.
No word yet on Lady Gaga's whereabouts. Her rep could not be reached for comment.
On a separate note, the local Fasano news outlet reported that Timberlake and Biel supposedly were officially hitched in Wyoming back on Aug. 20 when they took out a marriage license. But we're not sure how that's possible considering Justin was spotted filming scenes for his movie Runner Runner in Puerto Rico that day, according to Us Weekly. Also, officials in Jackson Hole said the duo did not file any marriage paperwork there.
The couple got engaged in Montana over the December 2011 holidays. But E! News has learned that they did not file for a license in the Big Sky area, either, where Timberlake owns a place at Yellowstone Club.
—Reporting by Baker Machado and Holly Passalaqua