The present invention relates to micelle drug carriers and methods of using the micelles to deliver drugs to target cells. The micelles are useful, for example, for carrying and targeting drugs for the treatment of cancer to cancer cells. As one example, the disclosure provides pegylated octadecyl lithocholate micelles that are labeled with a peptide ligand for colorectal neo-plasia and that carry the small molecule mTOR inhibitor rapamycin to colorectal cancer cells.