SB got pretty high on his 21st birthday -- literally! The "Crank That" rapper dropped $35 mil on a G5 jet to commemorate the occasion, TMZ reports. But that's not all! He also spent an additional $20 mil to pimp it out, putting in 12 custom Italian leather seats, flat-screen TVs, four liquor bars, a travertine tiled floor and Brazilian hardwood cabinets. He also renovated the bathroom and had the jet painted to include his logo. Watch out, Donald Trump -- Soulja may have a flyer ride than you!