H&M has great tank tops in the summer. The ones that are a cotton/poly/rayon blend as opposed to the ribbed 100% cotton ones. They're loose, large neck and armholes, longer than normal, kindof sheer. $7.
H&M tees are your run of the mill slim-but-not-too-slim shirts. Just a less boxy hanes tee with a tad softer cotton. $6.
If you're really small (