Yes to celebration when:
~someone has The Lessons from that relationship and therefore, is actually ready to leave it behind and move forward to far better and gr8er
~The person understands that it is NOT the divorce he/she is actually celebrating
~The person understands what IT IS he/she is actually celebrating and why
Not the best idea to celebrate when:
~The person thinks that now that he/she got divorced from THIS person, then being with someone new will “solve all the old stuff”
~The person thinks that by doing things (external things) differently in the next relationship (without doing the necessary INTERNAL changes), that is what will make the magic happen.