Keywords and tags - how many variations should a post have? General - All in One SEO Pack Forum

When writing keywords and tags for your blog post, how many variations of search phrases should you use? For example, if my blogpost is about celine dion's song "My Heart Will Go On" with an embedded youtube video of the song, should I create a taglist and a keyword list with the following search phrases:

Celine dion – My heart will go on
Celine dion new single (let's say this was her new single)
Titanic themesong
themesong titanic
my heart will go on
my heart will go on listen
my <3 will go on

or is this overkill? If someone searches a variation of one of the above search terms that I don't have in the list, like "celine dion heart will go on", will my blog post not show then?

Thankful for reply!