I'm not a huge musical person, but even I caught a whiff of the musically infused themes here. You tease! Makes 52A even better, though hats off for the witty descriptions of stuff like 6D, 7D, 25D (too bad it wasn't his right!), 34D, 58D, etc. I also like your commentary style for stuff like 29A, 30A, 44A, and 55A: just the right amount of voice. Love to see it!
The song where Karen O sings "Wait, they don't love you like I love you"
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Across
1A
The song where Karen O sings "Wait, they don't love you like I love you"
5A
Bring out
10A
People deemed to be better than others (Abbr.)
14A
Like a saga, usually
15A
Non-winner
16A
Relaxed sounds
17A
Cassandra-like one (you probably should have listened to her)
18A
Colombian corn dish
19A
What a cat might use to interact with your sofa
20A
Britney Spears-themed tea house?
23A
Cool and calm
24A
Surrounders of castles
26A
Football div. (American style)
29A
"I hate it when crosswords have really long clues, it's just a huge waste of time for the solver as well as probably the constructor, ___ frankly I'm not going to put up with it anymore"
30A
Something you might download once and then forget about
32A
Sound of punching, per comics
33A
With 39-Across, Backstreet Boys-themed tea house?
36A
Consequential phrasing?
38A
Aubrey ___ Graham
39A
See 33-Across
41A
Response to "Gracias"
43A
Mezcal source
44A
Like an omelet, or maybe the house of a person you dislike
45A
Primate from Madagascar that's always looking surprised
47A
"Seven in the morning, she'll be calling a ___" - Rare Essence, "Overnight Scenario"
50A
Hairstyles
51A
"Naw, bro" but more formal
52A
Good tea is usually infused with it
54A
Unwieldy pile
55A
Rubbing your finger and thumb together indicates the playing of one, which doesn't actually make sense
56A
Carly Rae Jepsen-themed tea house?
61A
Word after eggplant or veal on a menu
62A
Leek relative
63A
Sci. dealing with the environment
64A
Stagger
65A
Particular feature
66A
Mad (at)
Down
1D
Arizona hometown of Julie Ertz
2D
Imitates
3D
How some people might refer to pizzas
4D
Junk
5D
Really sending
6D
Singer whose signature 1956 song is ungrammatical in both Spanish and Italian, and instead has roots in 16th century English
7D
Bill Withers song in which he ignores the advice of his friends
8D
Hall of Famer Orlando (sorry for the baseball clue)
9D
Timeline sections
10D
Large-scale level
11D
The V in 10-Across
12D
It's a ghost!!
13D
Compass dir. often seen in cro___ords
21D
Apt rhyme with "groaned"
22D
Comedy style usually featuring the "yes and" principle
25D
Hook's hand
26D
Quietly agreed, even though you didn't actually understand what was being said
27D
Precede
28D
Trolley noises, in song
31D
Word that can refer to the north or the south
34D
Drawing out the first letter of this word usually signifies its opposite
35D
"Yeah same!"
37D
Rapper/actress whose original stage name included "of Destruction"
40D
___ Sahin, founder of BioNTech, which helped develop a Covid vaccine
42D
"Get ___ this fuckin guy"
46D
País con el periódico "El País"
47D
It became Maryland's state cat because of its black and orange coloring
48D
Alicia Keys' debut album "Songs in ___"
49D
Loose bracelet (alternative clue: Michael Steele)
51D
"Matrix" role that is an anagram of "One"! Get it?!???!???
52D
Roll with it!
53D
Things that might be taken on without more pay
54D
Web language whose letters can be found in "Hotmail"
55D
Let off some steam, literally or figuratively
56D
First aid procedure
57D
Country where you will find Dubai Mall
58D
"Uno! Due! ___! Quattro!" - Italian Ramones cover band