I didn't say she didn't have any hits at all. But she doesn't have back to back hits or many many hits aka not a big hit single artist. Of course has a couple good peaks, and a couple of hits on radio, but yeah don't get defensive for nothing.
"So Yesterday", "Come Clean", "Wake Up", and "With Love" I would consider her only hits since "SY" was #1 on single sales, "CC" a big radio success, and "WU"/"WL" both doing good digitally.