A good t-shirt, be it a simple white ruffled puff sleeve tee, a striped or polka dot top or something with a bow, is an essential component of Miss Rachel Berry's wardrobe. So I've selected the best of what's available now and all you need to do is add a (short) skirt and some loafers and you'll be good to go.
I think Rachel would like the taupe and black dot top with peter pan collar, the navy and pink striped top with pink bow, the red and white stripe top with large bow and the white tee with ruffled placket (all from Newlook). I think she'd love the navy 'Gull Wing' tee with double white tipped ruffles and navy and white striped tee with puff sleeves (both from H&M). The red and white polka dot and blue heart print 'Vita' tops from Oasis would be perfect for Rachel too as would the polka dot t-shirts from Forever 21, especially the one with the big bow on the shoulder. Talking of bows, I think Rachel would adore the 'Love you Longtime' t-shirt with oversized striped bow. I really like the asymmetric buttons on the 'Ruffled Waters Ahead' top from Modcloth and the multicoloured stripes and tiny ribbon bows of the long sleeved top from River Island.