Four people have been arrested for allegedly using social media to plan burglaries on stars such as Rihanna and Christina Milian.
Three men, aged 18 and 19, have been detained by Los Angeles Police, as has the 34-year-old mother of one of the suspects.
The addresses of basketball superstar Lebron James and actor Matt Damon were also found on a list at one suspect's house, police said.
Detectives believe the suspects chose their victims based on social media posts that gave away when they were away from home.
They allegedly showed up in expensive cars to stake out the houses before the break-ins.
Singer Rihanna's Hollywood Hills mansion was broken into last week, with three people reportedly seen running away as an alarm went off.
Watches, jewellery and designer handbags that police believe were stolen were put on show at a news conference on Tuesday.
A stolen car, a gun and $50,000 (£44,400) in cash have also been recovered.
The suspects were arrested following a burglary on Thursday at the home of LA Rams American football player Robert Woods.
His property was broken into while he played against the Minnesota Vikings.
LAPD captain Lillian Carranza said police believe the suspects are part of a larger gang responsible for more than two dozen burglaries.
She said they had targeted "actors, producers, musicians and professional athletes".
"The victims' homes had been selected based on social media postings and touring or travel schedules of the owners," said Ms Carranza.
She said the thieves would first knock to make sure no one was home, before breaking in and heading to the master bedroom to grab valuables.
They were often out before the alarm company could notify police, said Ms Carranza.
After the arrests for the Woods burglary, police said they linked the suspects to break-ins at the homes of LA Dodgers baseball star Yasiel Puig, Rihanna and Christina Milian.
The suspects have been named as Tyress Williams and Jshawne Daniels, both 19, and Damaji Hall, 18.
More from California
Hall's mother, 34-year-old Ashle Hall, was arrested on Sunday,
The value of items stolen in the burglaries is estimated at more than $1m (£889,000).