Apex domains cannot have CNAME records.
Question and response
Question
dig festivejewels.com. NS
Answer
festivejewels.com. 5 NS ns-1626.awsdns-11.co.uk.
festivejewels.com. 5 NS ns-581.awsdns-08.net.
festivejewels.com. 5 NS ns-910.awsdns-49.net.
festivejewels.com. 5 NS ns-1278.awsdns-31.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0