Conversation so far:
What happened in 1981?
In January 1981, Styx released Paradise Theatre, a concept album that became their biggest hit, reaching No.
1.
What was a single off the album?
five singles, including the top ten hits "The Best of Times" by DeYoung (#3) and "Too Much Time on My Hands" by Shaw (#9).
Did they tour during this time?
CANNOTANSWER.

Question: What is the backmasking accusation?
Self-contained rewrite: What is the backmasking accusation?