walmart. >> go ahead and get a nibble. >> reporter: patty's sweet potato pie by none either than patty labelle. >> patty! >> reporter: this guy did. ♪ ♪ [ bleep ] into patty. you turn into patty after eating this. >> reporter: his review turned patty's pie into a phenomenon. ♪ this isn't how it was supposed to end ♪ >> reporter: patty labelle is a cookbook and famed for traditions like mac reno and cheese but after james chanel posted his review of patty's $3.40 pie. ♪ you are pie praise >> reporter: walmart sold a pie a second. you don't see me holding a pie because it's nearly impossible to get them. check out walmart's website, out of stock, out of stock, out of