Mezue ahịrịokwu na-esonụ: "E=MC2" bidoro n'ọnụ ọgụgụ mbụ na "Billboard" 200 na 463,000 mbipụta rere, ahịa izu mmalite kachasị ukwuu nke ọrụ ya. N'afọ 2008, Carey gwakwara onye na-agụ egwu na-achọsi ike aha ya bụ Krystal na "Tennessee" ma nwee ọbịbịa na ihe nkiri Adam Sandler "You Don't Mess with the Zohan", na-egwu onwe ya. Kemgbe a tọhapụrụ album ahụ, Carey zubere ịmalite njem sara mbara iji kwado "E=MC2". Otú ọ dị, a kagbuola njem ahụ na mberede na mbido Disemba 2008. Carey mechara kwuo na ọ dị ime n'oge ahụ, wee nwee afọ ime, ya mere ọ kagburu njem ahụ. Na Jenụwarị 20, 2009, Carey rụrụ "Hero" na
Agbataobi Inaugural Ball mgbe Barack Obama ṅụrụ iyi dịka onye isi ala Afrịka-Amerịka mbụ nke United States. Na July 7, 2009, Carey <unk> tinyere Trey Lorenz <unk> mere nsụgharị ya nke abụ The Jackson 5 "M ga-anọ ebe ahụ" na ọrụ ncheta maka Michael Jackson.