The reunited band took to the Studio 8H stage for the first time in over 10 years.
The comic also brought out his mom to celebrate the special holiday.
The trio taught viewers a lesson on 'mom speak' in honor of Mother's Day.
ET spoke with the show's creator about how they will be handling Perry's role in the next season.
The actress' note comes a day after she tweeted that the show's renewal was 'not' good news.
The Oscar-winning actress will be featured in a recurring guest role when season three premieres on Netflix in August.
ET is bringing you fun facts about 'The Simpsons' to ring in the show's 30th anniversary.
ET has learned that NBCU will no longer distribute the daytime talk show 'Steve' after this season.
The heated scene was filmed for the upcoming Apple TV series, 'The Morning Show.'
'NCIS: Los Angeles' airs Sundays on CBS.
The actress apparently backtracked on her comments, tweeting Friday evening, 'calling them 'ill timed.'
ET has learned that NBCU will no longer distribute the show after this season.
ET caught up with the former 'Bachelor' star on the red carpet at the Steve Irwin Gala at the SLS Hotel in Beverly Hills.
The '9-1-1' star spoke to ET Live about the Fox drama and wanting to appear on 'DWTS.'
