Adele as she appears in the "Hello" video

Adele as she appears in the "Hello" video

Adele’s new single “Hello” is off to a blazing start, and could post the largest ever U.S. digital sales week for a song, according to industry sources.

The track, released through XL Recordings/Columbia Records on Oct. 23, could challenge the current one-week sales record holder: Flo Rida’s “Right Round.” It sold 636,000 downloads in is debut frame (week ending Feb. 15, 2009), according to Nielsen Music. (Adele’s largest sales week for a song was earned by “Rolling in the Deep,” which shifted 353,000 in the frame ending May 15, 2011.)

Sources suggest that “Hello” already sold roughly 450,000 in its first two days on sale. The debut week sales of "Hello" (ending Oct. 29) is scheduled to be announced on Monday, Nov. 2.

Such robust sales for “Hello” would make the song a serious contender for No. 1 on the Billboard Hot 100 to be revealed that same day. Adele has previously led the list three times, with “Rolling In the Deep,” “Someone Like You” and “Set Fire to the Rain.”

“Hello” is the lead single from Adele’s third studio album, 25, due out on Nov. 20.