Amazon reports Q4 ad revenue up 27% YoY to $14.7B, vs. $14.2B est., North America sales up 13% YoY to $105.5B, and International sales up 17% YoY to $40.2B (Annie Palmer/CNBC)

Annie Palmer / CNBC:
Amazon reports Q4 ad revenue up 27% YoY to $14.7B, vs. $14.2B est., North America sales up 13% YoY to $105.5B, and International sales up 17% YoY to $40.2B  —  - Amazon reported fourth-quarter earnings and revenue on Thursday that sailed past analysts' estimates.