19 is: Kick in the Door - Notorious BIG - couldn't remember the title earlier.
@MrFisk may be able to contribute to the rest - that's all I know.

In reply to this comment by eric3579:
Thanks, any more knowledge you can toss my way is much appreciate.

In reply to this comment by SlipperyPete:
Here's a few:

12. Real Hip Hop - Das EFX
13. Shimmy Shimmy Ya - Ol' Dirty Bastard
14. Method Man - Method Man
15. KRS - Step Into A World
16. Boogie Down Productions - South Bronx
17. Gang Starr - Full Clip
18. California Love - Tupac
19. TITLE - Notorious BIG
20. My Name Is - Eminem
21.
22.
23.
24. Mo' Murda - Bone Thugs 'n Harmony
25. Forgot About Dre - Eminem
26. Still DRE - Dr. Dre & Snoop Dogg

Thanks, any more knowledge you can toss my way is much appreciate.

In reply to this comment by SlipperyPete:
Here's a few:

12. Real Hip Hop - Das EFX
13. Shimmy Shimmy Ya - Ol' Dirty Bastard
14. Method Man - Method Man
15. KRS - Step Into A World
16. Boogie Down Productions - South Bronx
17. Gang Starr - Full Clip
18. California Love - Tupac
19. TITLE - Notorious BIG
20. My Name Is - Eminem
21.
22.
23.
24. Mo' Murda - Bone Thugs 'n Harmony
25. Forgot About Dre - Eminem
26. Still DRE - Dr. Dre & Snoop Dogg

Here's a few:

12. Real Hip Hop - Das EFX
13. Shimmy Shimmy Ya - Ol' Dirty Bastard
14. Method Man - Method Man
15. KRS - Step Into A World
16. Boogie Down Productions - South Bronx
17. Gang Starr - Full Clip
18. California Love - Tupac
19. Kick in the Door - Notorious BIG
20. My Name Is - Eminem
21.
22.
23.
24. Mo' Murda - Bone Thugs 'n Harmony
25. Forgot About Dre - Eminem
26. Still DRE - Dr. Dre & Snoop Dogg

Oh for sure, check me out
It's still Dre Day, A.K.
Before I chrome the lot, can't keep it home a lot
'cause when I frequent the spots that I'm known to rock
You hear the bass from the trunk when I'm on the block
Ladies, they pay homage, but haters say Dre fell off
How? My last album was "The Chronic"
They want to know if he still got it
They say rap's changed, they want to know how I feel about it
Dr. Dre is the name, I'm ahead of my game
Still, puffing my leafs, still with the beats
Still not loving police (Uh huh)
Still rock my khakis with a cuff and a crease
Still got love for the streets, repping 213
Still the beat bangs, still doing my thang
Since I left, ain't too much changed, still

Since the last time you heard from me I lost some friends
Well, hell, me and Snoop, we dipping again
Kept my ear to the streets, signed Eminem
He's triple platinum, doing 50 a week
Still, I stay close to the heat
And even when I was close to defeat, I rose to my feet
My life is like a soundtrack I wrote to the beat
Treat my rap like Cali weed, I smoke till I sleep
Wake up in the A.M., compose a beat
I bring the fire till you're soaking in your seat
It's not a fluke, it's been tried, I'm the troop
It's "Turn Out the Lights" from the World Class Wreckin' Cru
I'm still at it, After-mathematic
In the home of drivebys and ak-matics
Swap meets, sticky green, and bad traffic
I dip through then I get skin, D-R-E

It ain't nothing but more hot shit
Another classic CD for y'all to vibe with
Whether you're cooling on a corner with your fly bitch
Laid back in the shack, play this track
I'm representing for the gangsters all across the world
(Still hitting them corners in them low low's girl)
I'll break your neck, damn near put your face in your lap
Try to be the king but the ace is back

Dr. Dre be the name still running the game
Still got it wrapped like a mummy
Still ain't tripping, love to see young blacks get money
Spend time out the hood, take they moms out the hood
Hit my boys off with jobs, no more living hard
Barbeques every day, driving fancy cars
Still gonna' get mine regardless