It depends on the type of use.
The reproduction or use of someone else's copyright material without permission or license.Copyright infringement is the unauthorized or prohibited use of works under copyright, infringing the copyright holder's exclusive rights, such as the right to reproduce or perform the copyrighted work, or to make derivative works.
That would be copyright infringement if the original song was protected.
You would be guilty of copyright infringement, a federal crime.
Infringement limits authors' ability to make money from their works. Part of copyright is the ability to use scarcity to create or sustain demand, but infringement eliminates scarcity.
Copyright infringement is against international law.
Infringement is the use, without permission, of copyrighted material that does not fall under a "fair use" or other exception to copyright law,
Depending on how "thinly veiled" it could be judged an infringement of both a copyright and trademark.
Because "fair use" must be proven as a defense to copyright infringement, if it cannot be proven, and there is no other defense, then failure to qualify as fair use will result in the same damages as any other infringement.
Aneeta Brown has written: 'Copyright law for the church' -- subject(s): Church newsletters, Copyright infringement, Fair use (Copyright)
Copyright infringement of software.
It would be a trademark violation, which is similar.
It would be a copyright infringement if the advertiser has not paid for the use of the song. Advertisers generally do pay, because they wouldn't want the bad publicity of a court case.