The tag on this beautiful pink lily said "Theresa Princess Lily", so I supposed its the proper name. Indeed, it looks like an elegant princess.
A bunch of Theresa Princess Lily
These pink lilies were sold at Lowe's for $7.99 a pot even though they were at the end of their growing cycle. Like other lilies, they are perennial, and also known as dwarf Peruvian lily. To stimulate the plant to have more flowers, pull the stem at the base, but don't cut them.
One single princess lily
They bloom from early summer to fall. The soil has to be well drained, and moisture has to be moderate. The foliage are deep green, and they are happiest in filtered sun.