An unusual symmetry graces today's grid: the left to right invertibility places the revealer at the bottom center. Which is rawther amusing, considering that the revealer is CROWN. I did not see the connection between the four theme answers (I didn't even realize that ROLEX was a theme answer until the reveal came up). All of the theme answers are fine entries. Does 49A: Lana Del ____, singer with the 2014 #1 album "Ultraviolence" (REY) count as a bonus theme answer? It's placed just right for it.
The strange layout of the grid allows for two pairs of 10-letter down answers in each southern corner. USMARSHALS is great, as is LEOTOLSTOY. I love the full name. ANDROIDONE is acceptable, although I didn't know what the last three letters were until I filled in the crosses.
THATISALIE is fine, if a little formal, but in keeping with the emphatic nature of the clue. It also joins two other colloquialisms, IDOTOO and YKNOW. I like the last one a whole bunch.
1A: Hiking trail reference (MAP) is okay. I don't love starting a puzzle with a 3-letter answer. There's not much purchase to be made from such a short entry. I'll give this one a C-, especially since it anchors two place names.
Nothing much to note on the cluing, as befits a Monday. 24D: Encrypt? (INTER) is cute. I also liked 62A: Frequent Arctic forecast (SNOW).
Pretty good Monday.
P.S. I realize the connection between the puzzle and the picture will be obscure to all but my daughter. See, that's her favorite band, 5 Seconds Of Summer, performing for Good Morning America (GMA). She is somewhere to the left.