I’m American and I knew about her. Smile was at least a modest hit.

I said above that the album that was on, Alright, Still, is a really good album.

Edit: from Wikipedia-

Alright, Still debuted at number 20 on the Billboard 200 in the United States, with first-week sales of 34,000 copies.[51] The Recording Industry Association of America (RIAA) awarded the album a gold certification on 6 December 2007,[52] and by November 2013, it had sold 627,000 copies in the US.

That’s a bit less than half of UK sales, which is pretty good for a British artist in the U.S.