Courtesy: Glamour

Are we sensing a trend here?

Selena Gomez recently posed for Elle Mexico looking like a total grown-up, and now the 19-year-old has given Glamour the same treatment.

The "Who Says" singer looked absolutely adorable puckering up in '60s style shades for the September issue of the mag.

We think she looks gorgeous, but Selena told Glamour that it's not easy being a young Hollywood star:

    “You have this pressure to fit in and you want people to like you. I try my best to be a good person and be the best I can be.”

Even harder? All the rumors constantly flying around about her relationship with fellow teen dream Justin Bieber. She told the mag:

    "I’m 19, so I feel like everything that I’m doing right now should not be taken too seriously. I should be able to have fun and enjoy where I’m at! So I don’t want to spend my time hiding or worrying about all of that.”

Here here, sister!

See Selena go from cute chick to vampy vixen ... after the jump.