Jamie Lynn Spears is following in big sister Britney's musical footsteps, but with a very different sound. The former "Zoey 101" actress moved to Nashville back in 2009 to pursue a country career that is now starting to gain momentum. A showcase at Music City's 3rd & Lindsley Bar & Grill last week introduced the 21-year-old as not only an angelic-voiced singer but also an introspective songwriter.

One of the tunes that stood out on the Louisiana native's set list was "I Look Up to You," a song she introduced by saying, "You can imagine who I wrote it about." And it's pretty easy to imagine, given the lyrics that were no doubt inspired by Britney's very public mental breakdown a few years ago.

"Scared little girl / Living in a big old world / You've outgrown your room / It all happened way too soon / They took away your innocence / We forgot our strong defense."

Jamie Lynn, who is looking more and more like her sister these days, also performed the twangy "Miss Mississippi," inspired by the relationship with her 4-year-old daughter's father, and a ballad inspired by her childhood, "Small Town Girl." There's no word yet on when these songs will appear on a full album, though what appears to be album artwork is now on the young star's Twitter page.

Watch Jamie Lynn Spears Perform 'I Look Up to You'