The McFly lads, best mates with Busted, told Newsround in a webchat last week that they still don't think they are really very famous yet!
But a second week at the top of the charts may just change that.
Rasmus have obviously hit the right spot with many fans, because they were even voted into Newsround's own top rock act chart on Saturday.
There were four other new entries in the top 10, including Special D's Come with Me at number six, Narcotic Thrust's I Like It at nine, and Beyonce's Naughty Girl taking up number 10.
Atomic Kitten's final album, The Greatest Hits, was a new entry at number five in the album charts.