A white cotton T-shirt might be the single\u00a0most versatile piece of clothing on the planet. It's the ultimate cozy\u00a0basic, but it's also the perfect blank canvas to build on. We asked\u00a0 I Spy DIY blogger\u00a0Jenni Radosevich\u00a0to show our very own\u00a0Lauren Valenti how to transform a simple crew-neck tee into something much chicer, thanks to the help of\u00a0feather trim, retro-inspired lettering, and\u00a0a\u00a0stamped-on\u00a0pineapple print. The best part?\u00a0These looks are totally\u00a0wallet-friendly and\u00a0easy to pull off. After getting the play-by-play from Jenni in the video above, shop for your own cotton\u00a0tee\u00a0 here \u00a0and\u00a0give it a go at home. But be warned:\u00a0If you weren't already living in a T-shirt, you will be now. Follow\u00a0 Marie Claire on Instagram \u00a0for the latest celeb news, pretty pics, funny stuff, and an insider POV.