Complex sentence: The song was recorded during Sugababes'travel to the United States to work on the album; they subsequently signed a contract to Jay-Z's label Roc Nation which gave them access to the high-profile personnel.
Split into simpler sentences: The song was recorded during Sugababes'travel to the United States to work on the album. During this time, they signed a contract to Jay-Z's label Roc Nation, giving the group access to the high-profile personnel.