It sold 8.2M in 2011 according to IFPI and since then, it sold another 600k in the US & 500k in Japan. With these two countries alone, it's already at 9.3M.
Born This Way is closer to 9m and I don't think Telephone has even cracked 8m. Impressive nevertheless, but stop lying people. All of those songs by Katy are above 10 million for sure, and E.T. is above 9m. AATB will join the list soon.