The Mean Girls star, who will soon serve 90 days in a locked rehab facility due to charges stemming from a car crash, was spotted partying at a club in São Paulo Thursday and Friday hit Brazil's Lollapalooza.
Sources at E! Brazil tell E! News that while at Lollapalooza in São Paulo Lindsay got anxious when she saw the mass of photographers waiting for her.
She reportedly asked to be escorted to the VIP area by security, where she hung out with her entourage and was really chatty and upbeat. After the Killers concert at the festival, she left for a club called Cine Joia, where Hot Chip was playing.
Although Lohan seemed really bothered by the paparazzi that were following her everywhere, she told E! Brazil that she was in good spirits and busy writing music and lyrics for an album she hopes to release this year. She also posed for phone pics with fans.
Meanwhile, another source tells E! News the 26-year-old starlet has been having a less-than sober trip.
In the midst of scooping up a reported $100,000 payday for promotional appearances for John John Denim, Helenabordon.com site editor Matthew Evangelista said he saw Lohan drinking at a pre-Lollapalooza event at Unique Hotel.
"She did not drink anything but vodka," Evangelista said. "I saw her hands, while she was drinking and talking. And just before she left, she took a big sip and left the cup."
Lohan stayed at Il Campanario Resort in Florianopolis and was set to head to club Cafe de la Musique in the city for a John John sponsored party.
Monday, she will fly back to São Paulo and then back to the States.
Lohan's rep has not responded to requests for comment.
—Reporting by Sharareh Drury