Conversation so far:
What is Red letter days?
the Wallflowers' fourth album, Red Letter Days.
What is a single from that album?
"When You're On Top," was released to radio on August 16, 2002.
Did it do well?
The album was met with mixed to positive reviews.
Did the band tour for the album?
Around the time of Red Letter Days' release the Wallflowers embarked on a monthlong U.S.
tour stretching into early December.
Who wrote the songs?
Jakob Dylan began writing for the Wallflowers' fourth album.
What is a highlight regarding Red Letter Days?
Later that year while on tour with John Mellencamp, the band began recording using portable equipment.

Question: Did they collaborate with any other artists?
Self-contained rewrite: Did the Wallflowers collaborate with any other artists besides John Mellencamp?