Apex domains cannot have CNAME records.
Question and response
Question
dig plasticsurgeonsanfrancisco.com. NS
Answer
plasticsurgeonsanfrancisco.com. 3 NS ns-1111.awsdns-10.org.
plasticsurgeonsanfrancisco.com. 3 NS ns-700.awsdns-23.net.
plasticsurgeonsanfrancisco.com. 3 NS ns-618.awsdns-13.net.
plasticsurgeonsanfrancisco.com. 3 NS ns-909.awsdns-49.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0