Where was Sasha during Obama's farewell speech?

While many Americans were watching Barack Obama's farewell speech in Chicago on Tuesday night, others were left with one burning question.

Where was Sasha Obama?

The goodbye photo clearly only shows 18-year-old Malia Obama on stage with mum and dad, Michelle and Barack, but there's no sign of her 15-year-old sister.

Roi asked the question everyone else wanted to know.

***Spoiler***

The simple explanation is that she stayed in Washington because she had an exam at Sidwell Friends private school on Wednesday morning.

The school has educated the children of American presidents for years, including Chelsea Clinton.

So it will be used to cracking down on pupils for trying to miss class because of official presidential engagements.

But that didn't stop the #WhereIsSasha fun on social media.

Some people hoped she was trying to stop Donald Trump getting into the White House

This one show a scene from the Simpsons with Homer lying down in front of a taxi.

Jaime asked if Sasha Obama was the designated survivor.

Michelle was hoping Sasha was organising a revolution.

Lin said she works as a double agent from Vladimir Putin and was giving him her final report.

Some tweeters thought she was studying hard to become president in the future

OG Petty Wap even had a timetable for the Obamas to continue in the US presidency.

Josie showed her school timetable to show exactly what she's up to this week at school.

The one about her being at home because she's pregnant is just plain wrong

Only Blain thinks that she could be with child.

A lot of people were upset that it was the best excuse ever for missing something

Izaha said he'd never be able to come up with an excuse as good as Sasha's.

Viral had a similar comment to make.

And finally... Barack Obama paid tribute to his two daughters in his speech

He said he was proud of Malia and Sasha.

He also posted a photo of the three of then at the White House in Washington DC.

And another one of them at the Great Wall of China.

Sasha and Malia were seven and 10 when Barack Obama became president...

And here they are last year going on holiday aged 17 and 14 respectively.