Apex domains cannot have CNAME records.
Question and response
Question
dig onebighomethemovie.com. NS
Answer
onebighomethemovie.com. 5 NS ns-1635.awsdns-12.co.uk.
onebighomethemovie.com. 5 NS ns-1557.awsdns-02.co.uk.
onebighomethemovie.com. 5 NS ns-760.awsdns-31.net.
onebighomethemovie.com. 5 NS ns-823.awsdns-38.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0