Not sure how I can go about doing this- Hannah Montana bard

Hello!

For my DM's next campaign, she wants us all to be spell casters who graduated from a magic college-type vibe (it's a really cool idea that she's come up with). In my last campaign, I felt I was a bit too gloom and doom, while also not feeling like i was very good at understanding who my character was. She was meant to give off "chosen one" vibes, which I fear came off more as "pick me girl" vibes ahhh. 

In our next campaign, I want to be a little less like that. I was maybe thinking of being like Hannah Montana, in which I am a Bard that everyone thinks is in the College of Eloquence with the intention of becoming a politician (since that is what her parents are). However, at night, she is actually part of the College of Glamour, in which she is basically a pop star. I thought this would be silly and a little less deep compared to my last character. 

My only issue is how I go about trying to get people to think I am in the College of Eloquence instead of Glamour. Moreover, how can I build my character's spells to get people to think she is not part of Glamour?

Not sure if this makes any sense hehe. Thanks! 

Plot Twist:She's double-deceiving, & is actually a Whispers Bard.

Jokes aside, Changeling is the species to go with. Picking up some way to alter your voice would be ideal, RPing the character as being knowledgeable(int) and/or street smart(Wis) in her "normal" persona, then pretending to be less Int, & even more Cha & some Dex for flair when in "pop star" mode.