Here are just some funny mythological things I found on Selena's name. Half of them are ridiculous, so I added a bit of commentry!

SELENA
Gender: Feminine
Usage: Spanish, Russian, Greek Mythology

Though the name Selena creates the urge to understand and help others, we emphasize that it causes procrastination, lack of confidence, and the inability to realize your goals and ambitions.

» Not quite. I think it's pretty clear Selena's realized her goals and has acchieved them!

This name, when combined with the last name, can frustrate happiness, contentment, and success, as well as cause health weaknesses in the fluid systems.

» Well, apparently she has an awesome last name, because I doubt she has weaknesses in her fluid systems.

Your name of Selena makes you easy-going and refined, but detracts from your physical vitality.

» 0 for 3. Easy-going, yes. Lacking in physical vitality, no.

You desire all the finer things in life--lovely clothes, home, furniture, and environment.

» Alright, I'll give them that one.

However, procrastination is your worst enemy, and you find yourself lacking the ambition to make your dreams a reality often because of lack of confidence.

» 1 to 4. Dude, Selena's a famous actress. She's obviously got her dreams on track.

People are inclined to take advantage of your sympathetic, tractable nature.

» Maybe. I don't know her frieds.

You naturally attract people with problems who seek your understanding and advice.

» I imagine she's an understanding person...

Source: Behind the Name and Kabalarians