Andre Iguodala: In Court for Baby Mama Showdown ... Where's My Money Going?

Golden State Warriors star Andre Iguodala is on the stand in L.A. to testify in his child support battle with baby mama Clayanna Warthen.

Warthen is looking for $58k per month, up from the $16k Iguodala is paying right now to support their 6-year-old daughter London.

Over the last 2 days, Warthen's testified she needs the increase to pay for more extracurricular activities for London, who she says is a genius with a 151 IQ. She says the money will cover horseback riding, piano lessons, and a vocal coach for their daughter.

Andre's lawyer grilled Warthen about receipts -- she says she throws away most of them, and usually pays for things with cash. She also said all the support money is spent on the little girl ... even though some of the expenses include Sephora makeup and Victoria's Secret.

She was also questioned about the $150k she admits investing in a marketing company called LOC. Iguodala's lawyers said that company has been investigated for drug trafficking, but Warthen said she was unaware of that.

Andre's side thinks Warthen is just trying to take him to the cleaners, while she claims Andre's been neglecting their daughter by not spending enough time with her.