The Hella Mega Tour was a concert tour by American rock bands Green Day, Fall Out Boy, and Weezer that was announced on September 10, 2019 and originally included dates from March to August 2020.

[2] Weezer would also go on to release their fourteenth studio album OK Human on January 29, 2021, preceded eight days earlier by the lead single "All My Favorite Songs".

[4] On February 28, 2020, Green Day announced all nine solo Asian tour dates were postponed due to the COVID-19 pandemic.

[5] On April 23, 2020, it was announced on the social media pages of the Hella Mega Tour that a number of the European dates would be postponed.

[8] On February 27, 2022, Green Day announced their solo concert in Moscow prior to the European Hella Mega Tour leg on May 29 would be canceled due to the 2022 Russian invasion of Ukraine.