LONDON, ENGLAND - DECEMBER 08: Lindsay Lohan performs with Simon Le Bon of Duran Duran during a surprise guest performance at
Samir Hussein/Redferns

Duran Duran had a very famous surprise guest for fans at their Brooklyn concert Tuesday night, as they brought out everyone's favorite party girl, Lindsay Lohan. She joined the British pop-rockers for "Danceophobia," their collaboration from the band's latest album Paper Gods.

"Thank you New York! #duranduran #nyc @duranduran," Lohan wrote on Instagram after the performance, paired with this pic:

The actress decided to show off her cleavage in a low-cut ivory jumpsuit, but of course everyone's attention was focused on that finger. Rumor have been swirling that Lohan recently got engaged to Russian heir Egor Tarabasov. The couple haven't confirmed the news, but they fueled the reports even more as the starlet rocked a big emerald rock on her ring finger. Hmm...

While we continue to speculate on LiLo's love life, check out a throwback Fuse video of Mark Ronson interviewing Duran Duran: