1. "We Didn't Start the Fire" by Billy Joel: The song's title should grammatically be "We Didn't Start the Fire" with "didn't" as one word.
2. "Born to Die" by Lana Del Rey: The correct spelling of "die" in this context should be "die."
3. "I Will Always Love You" by Whitney Houston: Technically, the song should have an apostrophe in the title like "I Will Always Love You." However, it is commonly known and accepted without it.
4. "Livin' on a Prayer" by Bon Jovi: The possessive form of "living" is "living's," so the title could be "Livin' on a Prayer."
5. "Should I Stay or Should I Go" by The Clash: The title should technically use a question mark at the end, making it, "Should I Stay or Should I Go?"
6. "Let It Be" by The Beatles: The phrase should be "Let it Be" without the hyphen, as it is an idiomatic expression.
7. "We Are the Champions" by Queen: The title should technically use a plural verb, like "We Are Champions."
These errors are often overlooked due to the popularity of the songs. They can be attributed to artistic licenses taken by the musicians or simple oversights during the creative process.