Britney Spears' week of promotion for her seventh studio album, 'Femme Fatale' is so busy she's had to cancel a commitment after a scheduling clash presented itself. 

In a statement posted on both her Facebook and Twitter accounts, Spears explains that her forthcoming appearance on a popular chat show has been pulled:

‎"The Ellen DeGeneres Show has been postponed due to scheduling conflicts on both ends. Trying to put it back together for a later date"

Despite this setback, Spears is still continuing with her marathon of double television slots today (March 29) as she is set to appear on Good Morning America and Jimmy Kimmel Live, and you can watch her performance of 'Big Fat Bass' from GMA here: