But the tables seemed to be turned as she hangs with the McKinley High kids for the May 15 (8 p.m. ET on Fox) episode of Glee.
In exclusive photos from the two-hour special, Lohan, 25, guest-starring as herself, channels her inner judge (the showbiz kind) as she sizes up the competition at Nationals, where the glee club is vying for top honors after last season's upset. They'll take on show choir nemesis Vocal Adrenaline in front of a panel of celebrity judges, including Lohan, Rex Lee and Perez Hilton.
The casting news was announced in March weeks after Lohan, who has officially satisfied her probation terms in her drunk-driving case, hosted Saturday Night Live.
"Glee was fun to do!" she Tweeted Monday. "It made me want to live in a world of musicals where people always just burst out into song & dance!"
Up next for the rebounding star is a role as silver screen legend Elizabeth Taylor in an upcoming Lifetime movie.
Glee airs Tuesday nights on Fox (8 p.m. ET).
Adam Rose / FOX