
The question does not include enough information to give you a definitive answer. Presumably the line is well-known or recognized, otherwise it would not work as a bumper sticker. If the artist can claim trademark protection in the phrase, there may be an issue.
If not, then it may be ok. Particularly if the use is a parody and does not trade off of the original work, it may be permissible. There are not enough facts provided to consider these options.