Can I use "Twitter" and "tweet" in a song?

Use this link to view the court decision instead: http://bit.ly/9Gpe9

Your song (or a novel) can incorporate a trademarked product (or a celebrity's name) without violating anyone's rights. Someone owns the trademarks to Twitter and Tweet, and they could prevent you from using those marks on a competitive product or on some product likely to confuse consumers, but the rightsholders don't have a monopoly on the use of the words, and your song isn't likely to confuse anyone.

Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.