Use of "is" and "are" when referring to a singular noun or changing the grammatical number

Solution 1:

Both lyrics correctly feature intentionally incorrect grammar, also known as:

Enallage \Enal"lage, n. [L., fr. Gr. ? an exchange, fr. ? to exchange; ? in + ? to change.] (Gram.) A substitution, as of one part of speech for another, of one gender, number, case, person, tense, mode, or voice, of the same word, for another. [1913 Webster]

Pop songs lyricists have often employed enallage for memorable contrasts, e.g.: Louis Jordan's Is You Is or Is You Ain't My Baby, the Rolling Stone's (I Can't Get No) Satisfaction, Frank Zappa's You Are What You Is, etc.

When used well Enallage lends a certain emphasis; it increases the author, poet, or composer's set of available expressive rhymes, meters, alliterations, euphonies, and dissonances; the reader or listener receiving more variety finds themselves less prone to easily guess what comes next.

The price of enallage is loss of formality, and lack of clarity if used badly. Enallage is not useful in most kinds of legal documents or most formal instructions, excepting whenever and wherever it becomes important to use the fewest number of words, syllables, or letters possible. Enallage is useful for speakers that wish to quickly warn (or threaten) others about an unpredictable potentially dangerous situation.