Well, they are referring to the Billboard Hot 100, but they've got to be misinterpreting the information or something. "Toxic" only peaked at number nine. "Circus," I don't remember the exact number, but I think it went top three or top five. They might be thinking of the Hot Digital Songs then, but I don't know "Toxic"'s run on that chart. Actually, now that I think about it, "Toxic" couldn't of hit number one there as that chart wasn't around until 2005. "Toxic" was out in 2003. Maybe Top 40 Mainstream or Pop 100 then?
no i think they are meaning that her number ones spent a total of 4 weeks at the top because baby one time spent 2 weeks at the top
No. Look at the picture more carefully. It's referring to Toxic of spending 4 weeks at #1 on the Hot 100 and Circus has reached the #1 spot on the Hot 100.