First, be cute. Now you can be born cute, or you can have cuteness thrust upon you. But I don't know that one can achieve cuteness, at least not without a seed of proto-cute to cultivate.
Second, the 'stash. All men have to do is stop shaving their upper lips. But, being a lady, I need to supplement nature. Hence the invention of liquid eyeliner.
I went with a pencil mustache and soul patch. It's so 5 years ago, but this was...5 years ago! What a fun Halloween costume: I actually fooled some friends (from behind) into asking "Who's the new boy?"
The second attempt, at New Year's, was more dramatic. I still pull it off, but going Handlebar would be over the top. It's good to know one's limits.