"Merrill and her co-plaintiffs stress that they wrote, composed and recorded a song called "Game On" in 2016. Although Merrill concedes that Underwood’s version of "Game On" is different, Merrill insists that Underwood’s alterations are inconsequential. As Merrill sees it, Underwood was legally obligated to acknowledge Merrill as the song’s author and to acquire Merrill’s permission in order to use the song. Merrill depicts Underwood as falsely claiming that "Game On" is her original work." This is where she loses the entire argument, as there are many song's with the some of the same or similar lyrics and titles.
Look at Amebix's The Darkest Hour:
And when I'm dead
And when I'm gone
There will be one child born
And a world will carry on
Now look at lyrics from And When I Die by Blood, Sweat & Tears:
And when I die
and when I'm dead, dead and gone,
There'll be one child born and
a world to carry on, to carry on
If you Google 'Game On Lyrics' the first results are a song by Waka Flocka Flame and contain the following lyrics:
Game on, game on, hope you people ready - see the game on repeated here and song is called Game On - is she suing them as well?
It's a pathetic attempt to extort money and I have no doubt she will lose.