T.I. School's a Bitch So I Got One for My Kids

11/21/2013 4:55 PM PST

T.I. arrived at LAX moments ago with an adorable wittle bitty puppy dog in his hand ... seriously, this thing is frickin' cute.

And when we asked why such a tough guy was cruisin' around with such a teeny tiny pet -- he explained that he promised his kids a puppy if they got good grades in school.

The kids came through ... so dad kept his word.

We also asked T.I. about the mega-party he attended at Justin Bieber's house the other day -- but the rapper made it clear, his lips are sealed.

Maybe Justin's bribing HIM with a puppy ...