Should an article follow “some sort of” when a singular noun is used?

I was wondering what the rules are when it comes to using articles with the phrase some sort of, and specifically in this sentence:

They’re treating me like I’m some sort of a star.

They’re treating me like I’m some sort of star.

To me it sounds better with a, but I’m not a native speaker, so I don’t know. Feel free to suggest alternative ways to say the same thing.

Solution 1:

Straight from the BBC Learning English page (archived)

sort of (a) / kind of (a) / type of (a)

Sort of / kind of / type of are usually followed by an uncountable noun or a singular countable noun with no article, but a / an is sometimes retained in an informal style:

What sort of (a) / kind of (a) / type of (a) dance is that?

Well, it’s a sort of jig or reel, danced to very fast time. I don’t know exactly what it is because there are several types of jigs – single jigs, double jigs, slip jigs and hop jigs.

Note that when the indefinite article is retained, it sometimes has a derogatory meaning:

What kind of a DVD player is that? You don’t seriously expect me to listen to electronic music with no surround sound, do you?