Fifth Harmony singer Lauren Jauregui has reportedly been arrested for possession of marijuana.
According to US entertainment website TMZ, the 20-year-old was stopped at Dulles International Airport in Washington DC on Tuesday night.
After going through a checkpoint, she was forced by officials to submit to a secondary search.
That's apparently when a small amount of "what appeared to be marijuana" was found in her hand luggage.
Police were called to the airport terminal and the singer was arrested.
The group was on its way to Brazil to perform a set on Wednesday night.
The five members of Fifth Harmony have had an eventful year.
Last month Lauren wrote an open letter to Donald Trump voterssaying she was a "bisexual Cuban-American woman and so proud of it".
Singer Camila Cabello left the stage early at a concert in Missouri in September.
She later explained on Snapchat that she "was having too much anxiety" to finish the set.
In August, Normani Kordei said she was taking a break from Twitter following racist abuse.
There had been rumours of a rift in the group with the focus on Camila, who'd been working on solo material.
In July, the group was forced to defend one of its security guards, who was accused of "inappropriately touching" a fan at a hotel in Rio.
They say the girl had been trying to get into their room and he acted correctly.
And in May Dinah-Jane Hansen revealed the group's touring schedule meant she was forced to watch her great-grandmother's funeral on FaceTime.
Fifth Harmony finished in third place on X Factor USA in 2012.
They were signed jointly by Simon Cowell's Syco Records and judge LA Reid's Epic Records.
They've released two albums - 2015's Reflection and last year's 7/27 - and have won various awards including three MTV VMAs for best collaboration, song of the summer (both this year) and artist to watch in 2014.
