The birthday girl celebrated her special day in style with a weekend of fun festivities.
Host Ryan Seacrest will also be back for the music competition show.
Lionel Richie, Sia and Sheryl Crow also signed the open letter.
The 'Idol' judges and past winners came together for a star-studded performance on the song's 35th anniversary.
See which of the final contestants took home the victory Sunday night.
The expectant singer also opened up about how she's 'always felt very mothering' during Sunday's show.
The singer and judge showed off yet another elaborate costume during Sunday's remote episode of 'Idol.'
ET spoke with Jackson about how he's giving back by feeding those in need with his 'Heal Los Angeles' Foundation.
ET chatted with the judges of 'American Idol,' Katy Perry, Luke Bryan and Lionel Richie, about the show's new, remote episodes.
'AGT,' 'Idol' and 'The Voice' are making major changes to their shows so the competitions can continue moving forward.
For the show's first remote episode, Perry made sure to rock a truly unusual outfit.
After Sunday's surprising twist, fans took to Twitter to weigh in.
The special will benefit MusiCares' COVID-19 Relief Fund.
One singer brings her to tears after triumphantly returning to the stage after suffering a medical emergency.
