1. Goes to the top of, as Billboard charts
7. Wee bit o' Scotch, say
11. Still in the wrapper
14. Singer Clark with the hit "Downtown"
15. Treasure trove, figuratively
17. Allows access to (2 words)
18. Towering treats at some weddings
19. Frosty refreshers
21. "Geek Squad" worker
22. Nuts about, with "on"
25. Bad day in March for Julius Caesar
27. "Yeah, like that's gonna happen!" (2 words)
31. French Foreign Legion cap (Anagram of PIKE)
32. Suffix with cash or front
33. Fingerless accessory often worn by Adam on stage
34. It's fun to stay at, according to the Village People
35. "___ Attack," Queen song
38. Soap-making compound
39. British subway system
42. 2015 Brazilian music event featuring QAL, initially
44. Undercover officer's shout, upon revealing him or herself (3 words)
45. Absolutely first-rate
48. "Blue Suede Shoes" singer
50. Agency that led to the CIA
51. Heartburn-relief brand
52. Proof of title
53. Supplies with a crew
55. Evening show times, in Variety
56. "Give me _ ___!" (Request to Pharaoh)
58. Rock and Roll Hall of Fame's stately home
60. Running the show (2 words)
64. Classic jetliner
68. Pivotal door?
69. In other words...
70. Message spelled out with coconuts, maybe
71. With 11-Across, song performed on Idol and Ellen
72. Album featuring the single 11-Across + 71-Across, and the word connecting all the highlighted entries