Looking on the internet deeply has found these results:

In tears is the most popular phrase on the web.

On tears 1334,000 results on the web	In tears 121,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
All the people around were looking on with tears in their eyes. And with this... if it were to run on tears that would be something Legally Brunette's on a tear. When you think of me living on tears and grief, Our children are screaming and choking on tear gas. Come on, tear it off. And I see anyone waste a single second on tears, fire yourself. That little pregnant woman is doing one of the most selfless things a person can do, [feigning choking on tears]	So no ones left behind in tears. When the train started moving, Grandpa broke down in tears again. Eddie said you left in tears. Everybody at Lienhua said during yesterday's shoot you really broke down in tears. You came home in tears a lot. Aah! Some poor woman is in tears. Enough to drown us both in tears. There's no need to end up in tears.

On tears

1334,000 results on the web

In tears

121,000,000 results on the web

More popular!

All the people around were looking on with tears in their eyes.
And with this... if it were to run on tears that would be something
Legally Brunette's on a tear.
When you think of me living on tears and grief,
Our children are screaming and choking on tear gas.
Come on, tear it off.
And I see anyone waste a single second on tears, fire yourself.
That little pregnant woman is doing one of the most selfless things a person can do, [feigning choking on tears]

So no ones left behind in tears.
When the train started moving, Grandpa broke down in tears again.
Eddie said you left in tears.
Everybody at Lienhua said during yesterday's shoot you really broke down in tears.
You came home in tears a lot.
Aah! Some poor woman is in tears.
Enough to drown us both in tears.
There's no need to end up in tears.