Any operatic solo is called an aria.
An aria.
An aria is an extended operatic solo.
a solo by a singer is called an "aria". It is essentially one voice singing by itself without any other voices.
Scena
Not sure if this is what you're looking for, but an operatic solo is referred to as an aria.
Jessye Norman sang a solo called Tannhauser by Wagner. Jessye did this at her operatic debut at the Deutsche Opera Berlin.
Sometimes arias are called scenas, aria or scena in the singular.
Which commercial are you talking about first? If it is the haunting operatic solo - it's Maria Callas singing the aria "O mio babbino caro" by Puccini
The homophone for the word solo is "sow low."
Yes She Has A Solo In Human Again And Also Sings Part Of It With Other Characters
I flew solo across the sky , or , I sang a solo