Conversation so far:
Was this an album?
Boyz II Men headlined a "Love Cruise" in honor of their 20th anniversary.
Did a lot of people go on the cruise?
CANNOTANSWER.
Was the cruise reviewed by critics?
CANNOTANSWER.

Question: What else did they do to celebrate the 20 year mark?
Self-contained rewrite: What else did Boyz II Men do to celebrate the 20 year mark, other than headlining a "Love Cruise"?