Fall Out Boy has blamed everything short of Halley’s Comet for their failure to secure even a single Grammy Award nomination last week. Bassist Pete Wentz even bitterly blogged on the snub following the nominations announcement. But we are now hearing that the blame may lie solely on the shoulders of bassist Pete Wentz’s GF Ashlee Simpson. Spies close to the emo-rock group fear lip-synching Ashlee’s affiliation with Fall Out Boy has become bad for business.

“Grammy voters are fed up with Ashlee after she was caught lip-synching,” a pal of the band dishes to OK!, referring to the younger Simpson sister’s hilariously embarrassing October 2004 appearance on Saturday Night Live, when she was caught pretending to sing along to her own tune. “And her relationship with Pete has definitely affected public opinion of the band.”