Tiffany Haddish's rap career appears to be back in full swing -- evidenced by a pair of new songs she previewed last night ... one featuring E-40 and the other with Lil Jon.

TMZ Hip Hop obtained footage of the superstar comedian showcasing her new jams at the Hollywood Unlocked Impact Awards over the weekend from inside The Beverly Hilton ... make no mistake, there's nothing funny about her music, it's the real deal.

Lil Jon opens his track, urging everyone to drink and party until the club closes. Yeahhhh!!!

The E-40 track kept the same energy, sounding like an ode to big butts as the legendary rapper instructs listeners to look over their shoulder to peep both right and left cheeks.

We must admit that Tiffany holds her own on the track with her playful lyrics.

The HU awards brought out the likes of Babyface, Chloe and Halle Bailey, Law Roach, Muni Long, and Eric Bellinger. The outlet's founder, Jason Lee, tells us the turnout was nothing short of opulent ... as he thinks the culture is in critical condition.

Well by the sounds of her latest venture, Tiffany is doing everything she can for a cultural revival.