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This topic may prove to be more challenging.
How many songs can we list that have words spelled out in the lyrics?
Here are a few to get started:
V-A-C-A-T-I-O-N - Connie Francis
RESPECT - Aretha Franklin
BABY BLUE - The Echoes
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D-I-V-O-R-C-E by Tammy Wynette has a number of words that are spelled out.
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This one has the nine-letter word "happening" spelled out, which I believe is the longest one so far. It was the theme song of the Canadian tv show It's Happening.
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In Give Him A Great Big Kiss (The Shangrilas). Mary Weiss emphatically states at the beginning of the song:
"When I say I'm in love, you best believe I'm in love: L-U-V"
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Here's another one with some creative spelling, by Canadian artist Ronney Abramson.
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Gloria - Them
S-A-T-U-R-D-A-Y Night - Bay City Rollers
Trouble - Elvis
American Woman - The Guess Who. On the album version of the song, Burton Cummings does a scat intro, and he spells out A-M-E-R-I-C-A-N.
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In 1964, Sly Stone (then known as Sylvester Stewart) and Thomas Coman wrote Bobby Freeman's dance hit C'mon And Swim. They then came up with this song as the followup.
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M-O-T-H-E-R (A word that means the world to me) - Eddy Arnold