TAYLOR SWIFT Celebrate Her 34th Bday ... ICONIC STYLE THROUGH THE ERAS!!!

Taylor Swift's a year old and wiser ... ringing in her 34th birthday after looking utterly phenomenal in recent months with her best new accessory: Travis Kelce.

Needless to say, Taylor's style has come a long way from her early days sporting natural curls -- so let's take a swift trip down memory lane to check out some of her best sartorial statements from her changing eras.

She'd just released her album "Fearless" in 2008, but Taylor was giving wholesome back then ... as the teenager arrived at the Grammys in a strapless lilac evening gown, rocking natural curls and a deep side-part to boot.

Fast forward 4 years and the days of fedora hats and ballet flats reigned supreme ... with the singer sealing the deal with statement scarlet lipstick in light of her album, "Red."

Taylor was well and truly in her "Lover" era years later ... opting for girly colors, sequins, and glitter -- a fittingly flamboyant style in the run-up to her award-winning doc, "Miss Americana."

Her 17 years in the spotlight have been an historic run -- almost as if she comes back every time, because she never goes out of style. Happy 34th!!!

We covered it all on the latest episode of The TMZ Podcast, available on all podcast platforms.

Click here for info about our online advertising practices.