The phrase "a friendly song" is correct and usable in written English.
You can use it to describe a song that has a pleasant, welcoming, or cheerful tone.
Example: "The children sang a friendly song that made everyone smile and feel at ease."
Alternatives: "a cheerful tune" or "a pleasant melody."
It's just not a particularly friendly song, despite what its catchy melody and bouncy rhythm might lead us to believe.
Stephen Thomas Erlewine for Allmusic complimented Aguilera's approach to the song, writing that she sounds "comfortable" and "fresh," while Andrew Hampp for Billboard wrote that it is a club friendly song but does not show much personality.
"I don't think it's a number one friendly song if you know what I mean," he told Nick Grimshaw on BBC Radio One.
There is also the unexpected delight of their repertory, a genre-bending array stretching from "The Ride of the Valkyries" to the Sex Pistols' "Anarchy in the U.K," which they perform as a friendly folk song, infusing even lines like "I am an Antichrist" with a cozy bonhomie.
To my father, grocery store coffee came with a friendly little song.
The song is probably the most Eurovision friendly song the United Kingdom's had in years; it's got all the ingredients of a classic Eurovision song.
(laughs) I was writing songs and doing demos of them for the label, and they kept telling me that they needed a single that was going to be a radio-friendly song.
Shereen Low of The Belfast Telegraph described it as a "radio-friendly song", while Ryan Brockington of New York Post called the song "simply pure pop magic".
The male response to 'When a Man Loves a Woman' is much more friendly than the male response to 'How Am I Supposed to Live Without You', which they consider a more female-friendly song.
"Call My Name" has been considered a pop rock and "AC-friendly" song with a basic drum track and a "solid" melody.
