Desperate Housewives star Felicity Huffman was charged and arrested on Tuesday morning without incident at her Los Angeles-area home.
Magistrate Judge Steve Kim ordered Loughlin released from federal custody on $1 million bond following a brief hearing.
Singer pleaded guilty on Tuesday to racketeering charges.
The photos were used to create fake athletic profiles.
While Giannulli and her sister are in no way responsible for their parents' mistakes (according to reports, the students involved were allegedly unaware at the time, and are not being prosecuted) it still makes the case more puzzling that Loughlin would allegedly commit fraud so her daughter could attend college - when she doesn't seem that interested in going to school.
Gordon Caplan, who prosecutors say paid $75,000 a year ago to have some of his daughter's wrong answers corrected on a college entrance exam, was placed on leave from his post as co-chairman of the global law firm Willkie Farr & Gallagher, the company said on Wednesday.
Two college students have filed a lawsuit against the University of Southern California, Yale University and other colleges where prosecutors say parents paid bribes to ensure their children's admission. Prosecutors in the USA attorney's office in Boston say his company, Edge College & Career Network, amassed $25 million through the fraud.
Documents say Riddell took entrance exams for students or replaced their answers with his own.
Loughlin, 54, surrendered to Federal Bureau of Investigation agents early Wednesday after returning from Vancouver, where she was filming.
They allegedly paid bribes totaling $500,000 in exchange for their two daughters to be designated as recruits to the USC crew team, though they did not participate in crew, according to court filings obtained by CNN.
Singer disguised bribe payments as charitable contributions to the Key Worldwide Foundation - a purported nonprofit that was actually "a front Singer used to launder the money that parents paid him", Lelling said.
"We believe everyone charged here today had a role in fostering a culture of corruption and greed that created an uneven playing field for students trying to get into these schools the right way through hard work, good grades and community service", John Bonavolonta, FBI special agent in charge, explained. "Your parents' actions robbed a student from a position at this university".
The coaches worked at such schools as Stanford, Georgetown, Wake Forest, the University of Southern California and University of California, Los Angeles.
It was unclear how many children benefited, and investigators said more parents and coaches may yet be charged. More than 50 people have been charged.
On Instagram, she posted a picturesponsored by Smile Direct Club, an online seller of orthodontic retainers, saying, "For back-to-school season, I've been using a doctor-directed, at-home invisible aligner treatment with @SmileDirectClub". None of the schools or the students has been charged in the case.